Document Exyaa80pmz7B3KMwGEwG4Jg9n

PLAINTIFF'S EXHIBIT INSTRUCTIONS for using the PERF-A-TAPE* CORNER TOOL with PERF-A-TAPE Reinforcement... The PERF-A-TAPE Corner Tool is designed for applying PERF-A-TAPE Reinforcement to inside corners of gypsum panels. Note the two blades--specially angled to work the 90 inside corners of walls and ceilings. With this tool it is possible to apply compound to both sides of a corner at once. Likewise, tape can be embedded on each side in one operation, and the compound applied again with equally little effort! The corner system is composed of famous PERF-A-TAPE Reinforcement, a tough, fiber tape, and a specially formulated compound to conceal and reinforce joints in SHEETROCK* Gypsum Panels. When properly used, the system joins panels into one continuous wall or ceiling--in effect, a single smooth surface. -Reg. U.S. Pat. Off. A Copyright 1977, United States Gypsum Company U.S.G. joint compound, when used with the Corner Tool, should be mixed to a putty like consistency. The proper consistency can be determined with the Corner Tool as shown in photo "A". Note that it is thick enough to be handled without excessive droppings. A common and easily obtainable bread pan is considered the best container for joint compound when working with the Corner Tool. The desired amount of compound can be picked up easily by drawing the Corner Tool through the compound as shown in photo "B". B Printed m U.S A. JOINT TREATMENT APPLICATION | PROCEDURE r with the I PERF-A-TAPE CORNER TOOL i i .- 1. Compound is "buttered" in the corner evenly and smoothly. Care should be taken to prevenl "holidays" or bare spots. Cor ner Tool is held at a slight angle so that about IVa" of the tip of blades contact the corner. Works equally well for ceiling cove angles. 2. The tape should be folded down the center and positioned in corner. Using Corner Tool and additional compound, embed and cover the tape. Enough pres sure should be exerted to cut a good, true corner and squeeze out excess compound. BB 00 6 2 2 0 0 3. Excess joint compound can easily be re moved with the Corner Tool by using the top of either blade. The tool should be held at a fairly sharp angle and sufficient pres sure applied so that excess compound is removed cleanly and smoothly. 4. After embedding application is dry, compound is applied to completely conceal tape. Width of compound should be nar rowed to IVi" on either side of corner with tip of either blade to prevent com pound squeezing beyond edges of tool during final finishing and smoothing. 5. Final finishing should be long, continu ous strokes. For lower part of corner, tool should be reversed and moved up from the floor. Apply enough pressure to feather the compound to a smooth joint ready for any decoration. Light sanding may be neces sary. PREPARATION: DECORATION: Before joint finishing, check the job for board application defects, which, if not corrected, might result in a poor job. 1. Drive all nails or screws home, applying sufficient pressure on board while attaching to insure tight fit against framing members. Loose fasteners should be withdrawn or countersunk through board and driven correctly. 2. Cut away any loose paper showing on the surface of the area to be treated and sandpaper down to solid material. For flat, semi-gloss or high-gloss oil stipples or enamel finishes--first prepare surface with SHEETROCK Sealer or any other good-grade resin-emulsion type sealer. Use according to manufacturer's directions. For water-thinned latex of acrylic-latex finishes--apply GRAND PRIZE* Primer-Sealer or any good-quality hydraulic cement primer. For deep colors and strong tints in all types of paints mentioned--use a pigmented oil primer-sealer. To textured wall or ceiling surfaces--use a U.S.G. Texture or any other good-quality texture paint. For wallpaper and wall fabric finishes--apply one coat of a good-grade varnish, wall size or SHEETROCK Sealer according to directions on container. UNITED STATES GYPSUM U'L D<NG AMRICA -n- \ftfor-uor nr.v.ci fihiraoo Illinois 60606 `Reg U.S a:. Oft. jJ(Uui . i j ti i Clay produces slip and other essential working prop erties in joint compounds--usually a fine grind of attapulgus clay. Widely used in paper coating, petro leum refining, adhesives, paints, plastics, liquid fer tilizers, floor absorbents and fire extinguishers. Asbestos, a magnesium silicate mineral which occurs in fiber form, is used in joint compounds to control liquid separation and shrinkage, to provide slip and prevent sagging of compounds. Fibers are identified as either amphibole or serpentine. The amphibole form is often used for chemical filters, electrical insulation and paint fillers. This type contains minerals such as tremolite and amosite which have received much publicity as possible links to lung cancer. The serpentine or mineral chrysotile is the type normally used in making joint compounds. This type also is used for fireproofing and insulating purposes, in automobile brake linings, and as a consistency stabilizer in cements. Natural gums are obtained from a great variety of plants. Rough groupings are water-soluble gums, resins and chicle. Generally, they are soluble in, and swell in water. Consist largely of carbohydrates--arabic, agar, tragacanth. Arabic gum, for example, is used in adhesives pharmaceuticals, inks, textile printing, cosmetics. Marine algae derivatives are forms of thickeners obtained from special types of seaweeds. Used by the food industry in making gelatins, puddings and ice cream; also in cosmetics, pharmaceuticals, toothpaste. Fillers or Extenders Fillers are used to add bulk to and improve performance ofjoint compounds, and are selected for cost and general availability. They may account for 80% or more of the weight of a compound; are specified very precisely according to percent impurities, grade and color. The particle grade--or size--specified can be so minute that 100 particles would equal the thick ness of a sheet of notebook paper. As the particle size increases, workability of the compound can become more difficult and gritty or grainy surfaces can result. The grade of filler is especially important 16 B3006 2135 v in that it controls workability, cracking, shrinking, texture and color of the compound. The overall smoothness of the dried joint is related directly to the grades and types of fillers used. The following fillers are used indi vidually or as mixtures in joint compounds and many other products: Limestone rock, composed mainly of calcium carbonate, is classified ac cording to impurities contained. It is one of the most stable, common and Widely found of minerals, available as powdered limestone, marble chips and various types of chalk. Used in pharmaceuticals, dentifrices, food pro cessing, baking powder, agriculture, road ballast, portland cement. Calcium sulphate is a natural hydrous mineral containing 2091- water of crystallization. Found in many areas as alabaster, gypsite, satin spar, etc. Used in building materials, agriculture, and pharmaceutical and medical products. Mica is an ingredient that affects color, slip, shrinkage and crack resistance ofjoint compounds. Mica is a group of silicates of varying chemical compo sition that can be split into thin, flexible elastic sheets. As vermiculite, mica has the property of expanding 6 to 20 times its original volume when water is added. Talc is a natural hydrous magnesium silicate, commonly known as soap stone. Readily available, used as an extender ii and as a pigment in ceramics, gypsum board, asphalt shingles, cosmetics and pharmaceu ticals; as a filler in rubber, soap, insecticides, putty and plaster; as a lubricant and as elec trical insulation. Additives A very select and highly proprietary range of chemicals is added to refine I and stabilize joint treatment products and give quality to their performance. These chemical ingredients act individually or in combination to affect properties such as shelf life, solution time, mixing, ease of application and odor. Examples of such additives follow. Plasticizers are nonvolatile, organic liquids or low-melt solids produced from resins and added to joint compounds to improve flexibility and other properties. The terms "resin" and "plastic" are commonly used in the chem ical industry. Outside the industry, however, they are often mistakenly interchanged. Resin is the starting material used in producing molded artides; plastic refers to the final product that could contain resin, fillers, plasticizers and pigment. Plasticizers are especially important in rubber and in vinyl and cellulosic plastics. 17 a 2 O' ^ >-- Ul O' i rw* Reodorants are used in joint treatment products to destroy, mask or modify unpleasant odors. Defoamers are sulfonated oils or silicones used in joint compounds to reduce foaming which often interferes with processing operations. Such foams may be caused by stirring air into the viscous mixture. Defoamers also are used in the brewing industry and in water-treatment plants. Dispersing agents are materials added to a mixture to keep particles in suspension. Used especially with extremely fine particles of solids or liquids in finely divided form. Tetrasodium pyrophosphate, for example, is a generic term for a water-soluble, colorless, transparent crystal or white powder, used as a dispersing and emulsifying agent. These chemicals are used in latex paints, textiles, synthetic rubber, inks, pharmaceuticals, and detergents. Pigments is a general term for substances and mixtures used to add color to many products including printing inks, floor coverings, leather, wax and cosmetics. Pigments are almost always insoluble, but wettable with water. Iron oxide is a generic term for a red pigment, occasionally used in joint compounds in certain areas to help match the color of treated joints to that of wall surfaces. Preservatives is a general term applied to ingredients which act as fungi cides, bactericides and mildewcides to prevent bacteria growth in organic materials. In joint compounds, bacterial decomposition can cause odors, changes in color and weakened bond. Among the types of commercial pre servatives used are: Zinc oxide (Chinese white)--An odorless, white to yellowish-white powder, insoluble in water and alcohol, lead-free in American pro cessing. Used as a filler and accelerator in rubber and plastics; pigment and mold-growth inhibitor in paints; in ceramics, medi cines, feed additive, seed treatment and dietary supplements. Mercury types--These are very effective against both mildew and bacteria. Only small amounts are needed to protect joint compounds. Solvents is a term often applied to a substance such as water or alcohol, used to disperse or dissolve one or more other substances. Emulsifying agents hold in suspension two or more liquids which do not normally dissolve or mix with each other--such as oil and water. Typical emulsifiers are egg yolk, casein, soap and gums such as acacia and algin. Used in pharmaceu- 95006 2137 18 \ ticals, prepared foods, drycleaning solvents, and mixtures used in the textile and leather industries. Retarde rs are organic substances that delay or control the rate of hardening of joint compounds. Ground cattle hoofs or horns, which delay setting of gypsum products, are typical of commercial retarders used. Accelerators are substances which speed the hardening of chemical in gredients of joint compounds. One of these is potassium sulphate, color less or white, hard crystals or powder with bitter, salty taste. Used in ana lytical chemistry, medicine, fertilizer, aluminum and glass manufacture. Vehicles are liquids which may be volatile such as water, or nonvolatiles which are used to carry and to insolubilize the compound ingredients. 19 35006 2138 t . Joint Treatment Production The production of both powder and ready-mixed compound? is a batch pro cess. although two different types of equipment are used. When the equip- , , ment is changed over from the production of one type of compound to an- * j other, the inside of the equipment is carefully cleaned to remove all traces of the previous batch. This is necessary because of the incompatibility of some of the ingredients, and to maintain a "sterile" condition to prevent spoilage of the finished product. The same degree of care should be exercised on the job when mechanics change compounds. A small amount of one compound left on the tools can often contaminate another compound and produce unsatisfactory results. Powder Compound Manufacture In the production of powder joint compounds, the fillers, bonding materials and other critical ingredients are weighed and placed in the skip hopper. The contents of the skip hopper are then dumped into the mixer. The mixer is a double-shaft, horizontal blender which folds in the ingredients as the paddles rotate in opposite directions. When the in gredients are completely blended, gates on the bottom of the mixer open, dumping the contents into a receiving hopper which meters the material into the pulverizer. Here the powder is ground to uniform particle size. The pulverizer feeds into another receiving hopper that sup plies the packing equipment. Typical mixing equipment for powder compounds 20 Packing joint compound powder is a difficult task since the material tends to fluff up in the bag. Several methods are used to compact and bag the compound, but in effect all shake, bump or vibrate the filled bags prior to closing the tops. Because of the need to protect U.S.G.'s highly refined formulations from the effects of water vapor and to increase storage life, considerable attention has been given to the design of the package. The bag currently in use is manufactured by U.S.G. It consists of two plies of kraft paper with a film of polyethylene between. The film is unperforated, providing 8 to 10 times t. greater resistance to vapor penetration than bags used by some manufacI turers for packaging joint treatment powders. This results in more unifor mity in lots, mixing and application, as well as increased storage life. The bag also features a flat bottom for ease of handling. Sfci! CD Io o O' 1-11 ro o 21 1 J, Ready-Mixed Compound Manufacture Ready-mixed joint compounds, like the powders, are produced in batches. The dry ingredients are placed in a skip hopper and dumped into a holding hopper in the same way as the powder compounds. Here the similarity ends. As the dry components sift into the mixer, special binders are added at this point. The mixing con tinues until all materials are thoroughly blended. A viscosity (flowability) test is made to assure the proper consistency before the batch is released for I packaging. From the mixer the compound is pumped into containers. Lids are applied (either manually or by semiautomatic equipment.) and the process is complete. Typical production equipment for ready-mixed compounds ;-a:; I !: !.- iL ** I1 : Tape Manufacture The manufacture of Perf-A-Tape Joint Reinforcing Tape, a patented pro cess, is unique in the industry. Perf-A-Tape is perforated by electric sparks to provide a clean hole (.002 to .02 in. dia.) that will allow entrapped air to escape but will not allow appreciable amounts of compound to pass. The perforating is performed in a continuous operation of a machine capable of handling several tapes at once. The main innovation of the machine is two shafts carrying revolving, high- tension electrodes which align and produce a spark that passes through o the tape to produce the holes. An intricate synchronization procedure aligns o O' the electrodes at the exact instant of maximum electrical potential. 22 \ \ Bands of PERF-A-TAPE Reinforcing Tape emerge from spark-perforating machine U.S.G. products are developed to conform to the high standards necessary for foolproof results on the job. All raw materials are subject to extensive quality-control testing. During manufacture, samples of each batch are taken for immediate and future tests. As many as 16 individual tests are performed on each sample. Here again, these procedures can be compared to those of a master chef who carefully measures and blends selected ingredients and follows each step of preparation to assure finest results. When you buy and use U.S.G. Joint Treatment Products, you're getting tthe quality results of the finest materials and the most extensive research in the industry...from the people who pioneered drywall and joint treatment development. 00 uo o o O' IN) i-- IN) 23 i I ttt friantto. .. - ! $ '.Hiti".! he: a' :l i ! Record of Development As the originator of modern joint treatment, United States Gypsum has , ^ a history of industry "firsts''. Here are research developments that have * 1 maintained U.S.G. products as leaders in the field: Pre-1920--Plaster of Paris (first joint treatment material) 1920--Sheetrock Finisher (first improved joint compound) 1924--USG Joint Compound (first true joint compound) 1925--Cloth Mesh Tape (first workable reinforcing tape) 1925--U.S.G. Reinforced Joint System (first true system--tape with compound) 1927--Metal "A" Tape (first effective reinforcing tape) 1937--Perf-A-Tape Joint System (first mechanically punched paper tape) 1947--Low-Alkaline Joint Compound (first formulation usable with modern paints) 1949--Spark-perforated Perf-A-Tape Reinforcing Tape (unique im provement) 1 1952--The Two-Compound Joint System (first use of two specialized joint compounds: Taping and Topping) 1953--Ready-Mixed All Purpose Compound (first factory-mixed joint compound) 1963--Durabond Joint Compound-Taping (first U.S.G. hardeningtype compound) 1965--Ready-Mixed Topping Compound (first ready-mixed finishing compound) 1965--Cover Coat Concrete Finishing Compound (first for drywall trade) 1966--Durabond 90 Joint Compound (first multi-purpose hardening ncompound) 1967--USG Brand Joint Compounds (first major improvement in powder compounds) 1971--Durabond XL Joint Compound (first joint compound formulated for use with exterior ceiling board) 1972--Kemidol Joint Compound (first tapeless joint system for pro duction-line assembly of manufactured homes) 1973--Durabond Joint Compound-All Purpose (first hardening com pound which can be used for finishing) 1974--USG Crater Free Ready-To-Use Joint Compounds (first major improvement in ready-mixed compounds) 1974--USG Ready-To-Use Compound-Taping (completes the first twocompound ready-mixed joint system) o o O' rv h-* UJ 24 V And U.S.G. Joint Treatment Products Perform Best--by Design ^ A full line of U.S.G. Joint Treatment Products embodies the desirable char acteristics that science and field experience have proven most effective to meet any job requirement. USG Crater Free Ready-To-Use Compounds --the key to quality joint treatment One of the most annoying and costly characteristics of all ready-mixed joint compounds was the problem of cratering--small pits in the surface of the dried compound caused by air entrapped in the compound when produced. These craters required extra work and material to eliminate. In addition, many ready-mixed products were produced in standard consistencies which, in many cases, had to be diluted and remixed on the job, adding to the cost and delay as well as increasing the possibility of cratering. To overcome these problems, United States Gypsum recently introduced its USG Crater Free Ready-To-Use Joint Compounds. These are the best selling, fastest-growing joint compound products in the industry--factorymixed to a smooth, crater-free, truly ready-to-use consistency. There is no need for additional water, or the use of electricity or mixing equipment at the job site. Available in Taping, Topping and All-Purpose types and in hand- or mach ine-tool consistencies, Crater Free Compounds feature superior ease of handling and crack resistance plus excellent adhesion without excessive hardness for easy sanding. The material's vinyl-tvpe binders provide many of these properties. USG Crater Free Ready-To-Use Joint Compound-Taping is a readymixed product that can be used directly from the container with no timewasting mixing or retempering. This creamy, smooth, vinyl-base com pound handles easily and saves time; embeds tape, drywall comer beads and trim perfectly. 25 BB 00 6 2144 .HMMfifel! USG Crater Free Ready-To-Use Joint Compound-Topping is a vinylbase finishing material with uniform high quality and working consis tency: also may be used as a first coat over metal comers, drywall trims and fasteners. Produces smoother finish with less shrinkage and sanding than Ready-To-Use All Purpose Compound. Makes an excellent tex- turing material. USG Crater Free Ready-To-Use Joint Compound-All Purpose is a drying-type formulation widely used for embedding, finishing and tex turing because of its uniform high quality. On-the-wall cost averages the same as, or less than, that of powder compounds. Also used with reinforcing tape for repairing cracks in interior plaster and masonry not subject to moisture. USG Powder Joint Compounds --the ultimate in materials that mix faster, apply easier These noncasein powder compounds offer outstanding performance char acteristics, including shorter mixing time and stable consistency. While they are not compatible with casein-tvpe joint compounds, they may be used with Durabond Compounds and USG Crater Free Ready-To-Use Compounds. \: gUSG B c0Cl) BmgUmSG i0n USG rsjO; _/ USG Joint Compound-Taping is designed for embedding tape and fo first fill coat on metal comer beads, drywall trims and fasteners; also used for patching plaster cracks. Offers outstanding bond and resistance to cracking. USG Joint Compound-Topping is a smooth-sanding material for second and third coats over taping compound. Produces excellent feathering and superior finishing results. r-VipT-ppf pricfirc in n cincrlp nrnHllrt for lisp whpre finest results of the properties. i. DURABOND Joint Compounds --the top selection with engineered performance A These hardening-type compounds provide faster finishing of drywall inWteriors even under slow drying conditions. Rapid hardening permits same- day joint finishing and usually next-day decoration. Low shrinkage and superior bond are outstanding features. All Durabond Compounds are excellent for laminating gypsum panels to gypsum panels, to sound dead ening boards or to existing above-grade, clean concrete surfaces. When used with Sheetrock SW Gypsum Panels, the system produces the strongest drywall joint ever developed. The exclusive eased-edge design of Sheetrock SW Panels helps compensate for framing irregularities, dam aged panel edges and extremes of temperature and humidity that can cause ridging and beading. DURABOND Joint Compound-Taping is a hardening-type material for embedding tape, drywall fasteners and metal accessories. Also ideal for heavy fills because it chemically hardens in 3 to 4 hrs. Virtually un affected by humidity. DURABOND Joint Compound-All Purpose is a hardening-tvpe material I that can be used for all drywall joint treatment applications--taping, filling, patching and finishing--with the convenience of a single-package product. Offers satisfactory performance in all three stages ofjoint treat ment with remarkable strength, bonding and humidity-resistance char I acteristics. Can be decorated with selected coatings while still damp, I an exclusive feature among all joint compounds. A finish coat of Ready1 To-Use Compound is not required. DURABOND 90 Joint Compound is the required pre-fill material for Sheetrock SW Panels to smooth and strengthen joints between pan- cd I els. Its 1-to 2-hr. hardening time also makes it an ideal alternate for 0 Durabond Joint Compound-Taping in applications where faster finish- ing is desired. Also used extensively on the job for patching and touch-up work. fN* -C' O' DURABOND XL Joint Compound is a distinctively superior product designed to treat joints, fasteners, drywall beads and trims and provide heavy fills in USG Exierior Gypsum Ceiling Board application. Hardens in 30 to 60 min.; offers outstanding properties of bond, moisture resis tance, edge-crack resistance and low shrinkage. PERF-A-TAPE Reinforcing Tape The industry's No. 1 joint reinforcement tape is manufactured from special cross-fibered paper possessing great tensile strength, both with and across the paper grain. Average cross-tensile strength of Perf-A-Tape exceeds 38 lbs. per in. width, producing joints as strong as the board itself. The tape also has exceptional wet strength...resists stretching, wrinkling and other distortions. Smooth, tapered edges lay fiat and resist tearing under tools. Perf-A-Tape is spark-perforated to allow air to escape; perforations are too small to show through finished joint surfaces. A controlled taper from side to side and wafer-thin edges of 1/200 in. (thinner than a razor blade) reduce possibility of edge cracking. Perf-A-Tape is outstanding in all other characteristics. It is ironed for smoothness, and precisely center-creased for easy application to angles. Moisture content is controlled--longitudinal dimension change after being wetted and dried is less than 19c. This vinyl-base product is designed for filling and smoothing interior mon olithic concrete ceilings and columns located above grade--no extra bond ing agent needed. Supplied in ready-mixed form (sand can be added), easily applied with drywall tools in two or more coats. Dries to a fine white sur face usually making further decoration unnecessary. ou o o O' l\> 28 Compliance with Recognized Standards U.S.G. joint treatment products comply with ASTM Standard C475-64 and Federal Specifications SS-J-570a-Type 1 for joint compound only, Type II for tape only, and Type III for joint compound and tape. Conclusion Now that the formulation and manufacture of various types of joint treat ment products from U.S.G. have been described, it's easy to compare the careful selection and blending of ingredients with the preparation of gour met dishes that have made outstanding chefs and restaurants famous the world over. The balance of chemistry, like that of gourmet cooking, is an art that has been developed to a fine point. Constant experimentation and refinement have produced joint treatment products that meet the most exacting de mands of the professional builder and homeowner alike. O' 11 o o cn cr cn c 0) 2- 3) 2- c [ Q. , CL xj to 0 0. 0 ?=; h1* nLX 3O f'l I ft ac " n ffl 5 c *7 i? 3 3 -o "? CL c h- 3 C 3 2c Cl 3 OE O-- *7 < >* " mCO *D C 3 O *3 C ;3 O l 1a 0E O Q. E o O (0 ow ?d O CO 17 3 cn cc c 0 Q. 0 CL `t1? a E 0 O k_ ;a iE 0 O O ; 0 !63 t.i 3 c 0} B 3 O O. E 0 oc C O _i X Q O o *0 O g TJ| H*^wZ e--c .1fo0t Q 0} Z 55 2 CD w o<r Po- >s k. 30 0 cn CC . O& 03 E3 0a OE *o .e 0a 0 s?O CL 3 a a. a 0 ca Q. =S a3 z 0 3 ES 2c < CC 3 o2 3 = C/3 0 CO 0 co 0 co -- co w Q < 3 K 3 O .3 H 3 < 3 0 Q <o/> fIt t/> O x Ml o jlJ 0) CO E o CO >N ft CO is f n a (B ft o -- c t "O a ? g `o 5O _ T "0 O cl con> = 2 2 XJ C 3 O cl E o o Q <25 Z o m 9* <3 cn cl 3= Q< 3 c 3 O CL E 0 O Oz O 5 3) 3CC *5. * O h- (0 O 0 Q35 , QO-- 7 < a0 0 01 CC .5 0^ 0 Q. 1 03 2 ua OE CO 0 3O a c 3 0Q_ E 0 O *3 O 3) a. .E Oa CO 0 3 1- J *6 c 3 O Q. E 0 O 0 0 CO 52 0 9* 0- 5 0 0c0 = 3< 3 c 3 O a E 0 O 0 0 Oz O CD < CC 3 Q = -l " 3- 3 c 3 0 2SCtw T15.3C^2Iad CL E 0 0 _J .--E, cft aO X S^ Q c4> Xo ft O I SL* CD 3?J rI<Xr* ?? 3 LJ r T3 s ua) Q. rE3 (0 2 ! n ft c o ft ft ft o> sc ft o aa .. 9 W o jg O c *c U^ S 2 s; LL Eft >O c JO 15 JJ ~a. a. < jO o c *6 c 3 O a E o a O <j> Z co og m 2<a DC 03-- Q< 0 to 0O to Cl =? 3 0 c 3 0 Q. E 0 O O 0h- -- S5 CE cn 0 .E 0 Q. * c 3 O a E 0 O *6 c 3 O Q. E 0 0 3 C 3 O a. E 0 O 0 05 Qz O 5< cc 3 | cn c I1 ag-l 0 0 *o X) 2 $ 0 O a ! Q0. E !O co 0 ! co 05 I c a ra 3 t0o i $0 0 0 9-1 m 5< 0 CC co = 3 Q t- 3 O 3 1- | 3 < | a . Csj CO LO I co c j> 3 C 3 c>o --53 S w ft O CL |O e 5 a jj E 0 ft ft c 0 * .11 a CL -1 X 0=2 < 0z O 0 CD E *o 0 < --- T3 2 rUr. JC 111 3 - "O -o LJ ISl I f 30 \ Glossary of Terms Additive: Special ingredients that refine and stabilize joint compound products. Adhesion--Bond ofjoint compound and tape to surfaces. All-Purpose Compounds--One-package products suitable for all joint compound applications. Binders--Ingredients that hold joint compound materials together and provide bond or adhesion to surfaces. Bond--Holding power of compound when dry. Check Cracking--Random cracking in joint compound surfaces. Cohesion--Ability of joint compound ingredients to hold together. Compatibility--Feature of a joint compound that allows it to be used with other compounds and various types of gypsum panels. Coverage--Surface area--including nailhead, bead and trim finishing-- that can be completed with joint treatment. Cratering--Pockmarks in surface of joint compound, usually caused by air bubbles in compound. Drying time--Period required for all water to evaporate from applied joint compound. Edge-Crack Resistance--Ability of finished joint to resist cracking along edges of reinforcing tape. Feathering--Process of smoothing compound at edge ofjoint during appli cation. Fillers--Powdered materials used for body and bulk in formulation ofjoint rf compounds. Hardening Time--Period required for chemically hardening-type compound to become hard. Mix Life--Also "pot life". Length of usable life of powder-type compound after being mixed. Mixability--Easy-mixing quality of powder compounds. Powder Compounds--Dry products to be mixed with water for use. Ready-To-Use Compounds--Factory-mixed products ready to use on the job. Sandability--Ease of sanding to level surface. C2 ZD O o O' 31 o Shelf Life--Length of time compound can be stored. Shrinkage--Depressions occurring in surface of compound over joints, nailheads and trim as drying takes place. Slip--Ease of application of compound. ^ Stability--Long-lasting uniform consistency of joint compounds. Taping Compounds--For embedding tape and for first coat over reinforce ment. Topping Compounds--For fill and finish ooats over tape and reinforcement. Wet Tack--Ability of compound to stay in place on surface and tools during application. For specific application instructions, see U.S.G. publications: Dcrabond Joint Compounds--J-17; USG Powder Joint Compounds--J-47; USG Crater Free Ready-To-Use Joint Compounds--J-60; Perf-A-Tape Reinforcing Tape--J-67; Cover Coat Drywall Compound--J-59; How to Install and Finish Sheetrock Gypsum Panels--J-333. t o o o r\j --* 32 BUSINESS REPLY MAIL No postage stamp necessary if mailed in the United Slates POSTAGE WILL BE PAID BV: United States Gypsum Company 101 South Wacker Drive Chicago, III. 60606 Dept. 122 FIRST CLASS Permit No. 760 Chicago, III. C I .2 V> ~ 5.8 -C .2 S? 5 H r * a I o ? wp: ^IF- I --X|J -o2 | a -X--5 Oo "cO 1 2 'O o, " <c ? iS in -P " =i ojce <5 S ^5 S : . D*c CS S2: s6 |> CcO0 *iwco o ': ^ rO . |.2 18 I c = o0, 5 ct3 hco. c: . ,^: * <3 |! r 11 o .. I sc III iZ C ;a :5> o5O B3006 21 O v0>) -oJ O is25 I -aa it 5< 3_ O PST! em S*c C3Ic > E oo 0) UJ CO`cc <>7 & S * IS O So Is ee =C> ^O 01 O Is Ic O !o w Ots> ir. => oEo yuuu'j