Document dYLRjvYvjNgwm9VYQDMMxKJr0

t'31'61'00 d9S PLAINTIFF'S EXHIBIT Advantages of Bestwall Light Acoustical Plaster HIGH NOISE REDUCTION COEFFICIENT GOOD LIGHT REFLECTIVITY EASILY DECORATED IDEAL FOR MACHINE APPLICATION 100% FIREPROOF ECONOMICAL 3M niX31 ASV3 iSOO M01 NOIlVQIIddV NflO y 0103 N0I1331J3H 1HDI1 NQIian03d OHOOS flflnMVMSIQJ iSV1d TOJisnoov iHsn T1VM15M ,v r?:\ CT^IPM PI &S1FR vs n "1 H-K 6-W01 d3-ltlS-MS N DIUDA|Asuuaj 'ajoiupjv anu3Ay jatsD3uDi isog 02 l uoiiDJodjo^ sa|D5 paa^-uiotja^ ||D/*(sag :p6nojL|| p|og | Auoduie^ uincdAo ||DM|Mg :Ag apoyy wSim sXdmjd onpo-id X|i|Dnb (534614 341 jo noA sjassd oj AjO(DJoqD) XuDdoio^ ainsdAQ ||OM(S3g Sl;, Ul A|(UD(SU03 pa(S3(-3j puD pa(S3( Si (I 'UOj|d33X3 OU SI J3(SD|(j |D3j(Sn03y (4611 ||DMJS3g ^ ^^JDSSSJ 3AIID3J3 pBnoJLj, spnpojd uinsdA6 A(i|Dnb dot. 4(1 m, noA SBpiAOjd AuDdiuo^ wnsdAr) ||o*4S3g H3iSVld lVDIiSnOOV 1H3I1 -P*loiin. T cr zc C =3 tr 3 ft H >X^~ it* r r* S' - 3 cr > 3 id. ^v rft. Z-- C y era O z -H o> Ocv> n jc = > =c Cl cl 7; Question 1 How effective is Bestwall Light Acoustical Plaster for noise re duction ? 2 Does Resrv- jl| Plaster rerlert -ound ? Light A ou-tica! light as urll ,i> 3 Does Bestuail Light Acoustical Plaster protect against fire as uell as -ound' A Can Bestuail Light Acoustical Plaster he applied be piaster gun0 5 Is Be'twall Light Plaster sdit.-iv 3 A, wstw ai Can B'-stua.l Light Cou-uea; Plaster be dec grated 'a-i'c- 1 Answer --BfSfj.aU Light Acoustical Plaster has a noise reduction coefficient of from 55 to .60. Ordinary hard jail and calm" surfaces reflects about 97r'r of the noise reaching it and bounces it back and forth m a room. Tins reflection creates air dis turbances and echoes in a room. This reflection of sound :t aces from hard J all surfaces is knottsn as "reverberation" and is one of the mam causes of sound dis tortion and unsatisfactory acoustics. Bestwall Light Acoustical Plaster aborbs about >0rf of the original .ound and soaks up rcicrbera!ions and echoes fast enough to that sounds produced uithin a room are not garbled or con fused. but clear and audible for perfect .ound control. The sound-ball chart at the right shout the sound absorbing action of Best ir all Light Acoustical Plaster. -- B.stuall Light Acoustical Plaster. ..non applied:: on produces an attract'-e ..a :aui .-hue finish which reflects corn 67 to 6)rr of the tight striking its sur'ace. This is important m oiaces such as schools or offc, . hire correct lighting a "fust. --B. .snail Light Acoustical Plaster -s made of truombustible minerals--<t .ant bum or support combustion. In 'aC. the are prott L'lO't obtained by using this 'taster, :n many cases, may cut "lie : l .si 'ire toirancc premiums. -- Bts'.-all Light Acouitu cu Pa.:.r sis 'tecaslv b' : loped for arn .-aston -::h a `va : r gnu and easily v ' . i c: ban a. Ltjit A iou .lu a! Pla me.: ei gnomical mat, cttis u d h- tt.cal ".".on >'' B-.ts-.a.l .1. ai Plds'er mw. oe mitCsd " : . 'f. i i- ae sir-.d When paint- c " : 'I'td'h, r ".ne oi pa.if L. ,-L . a ai P'a.t - SGP 0019122 gypsm: r,:cults iahual Chapter IV Factors Affectin': Hose Pressure Using plaster especially formulated for machine rpvlication :na maintaining proper mortar consistency ore necessary to keep loose pressure . t a minimum, but thor<_ arc also several other important factors. 1. Hose length - Pressure varies nearly directly -ath length of nose 'used. A pump (cylinder or Hoyno ( will develop approximately twice as much pressure with a 60* hose as it will with 301 of the some hose, 2. Hose size - Diameter of hose is definitely a factor. If pressure for 60' ef 2" hose is 50 psi, pressure required for 60 of l|" hose would be about 165 psi. 3. Lffect of height - In addition to pressure developed with an length of hose, about one-half pound, per so. inch must be added for every foot the plaster is elevate-'... For examrle, if the machine is on th ground and the hose is run up to second floor, v/nich is 30' above ground, there trill be an e::tra 15 psi hose pressure,. L Proportion of iigrregate - A rich mix (2 to 1) will 'usually result in more pressure than a leaner mix (3 to.l). The richer nix will usually have to be slightly thinner than the lean one in order to get same capacity from, the machine. 5. hortars containing verm.iculite aggregate normally pump with considerably less pressure than those containing eitr...r perlite or sand. Remember, high hose pressure results in lower capacity and more machine wear. 3estwa.ll gun plasters are formulated to pump with as lot-: pressure as possible and at the same time work good 'under the tools after being sprayed or. the wall or ceiling. Spraying acoustical Plaster Eestwall Light Acoustical plaster was formulatec especially for machine application. It works well in -all type machines. Hose pressure is net normally a problem -with this tyre plaster as it pumps easily: with a lot-: pressure. The Nozzle* 3 The nozzle of all plaster machines are basically the same. The mortar goes through an orifice, most have several interchangeable orifices varying ir. diameter frem 1/L" to 5/8". Compressed air is fed to the nozzle. The mount of air, consistency and tyre of mix, volume of mix and size of orifice determine the spray pattern. The nozzle operates lrr emitting a globule of mortar, then air, then mortar. Lot: frequency cf thi: cycle results in large globules of mortar while high frequency results in very small globules. To lover frequency: (1) Use letter air pressure (2; use larger orifice (3) If air stem is adjustable, use greater distance from -air stem to orifice. To increase frequency, resulting in finer spry- pattern, reverse above proc--r-:. L.0133 Hovemb- . I, Id SGP 0019123 GYPSUl-i F7.G DUCTS iAilUAL Chapter IV Factors Affecting Hose Pressure Using a' plaster especially formulated for machine application nne maintaining proper nortcr consistency are necessary to keep hose pressvrc at a minimum, but ther<. arc also several other important factors. 1. Hose length - Pressure varies nearly directly --ith length of hose used. A pump (cylinder or iloynoj will develop approximately twice as much pressure with a 60' hose as it v/ill with 3U' oi the same hose, 2. Hose size - Diameter of hose is definitely a factor. If pressure for 60' cf 2" nose is 90 psi, pressure required for 60' of lj" hose would be about , 165 psi. 3. Effect of height - In addition to pressure developed with an length of hose, about ore-half pound per so. inch must be added for every foot the plaster is olevatcu. For example, if the machine is on the- 'round and the hose is run up to second floor, which is JO' above ground, there will be an extra 15 psi hose pressure,. L. Proportion of Aggregate - A rich mix (2 to 1) will usually result in more pressure than a leaner mix (3 to l).Tho richer nix will usual!;' have to be slightly thinner than the lean ono in order to get same capacity frem the machine. 5. korta.rs containing verr.iculite aggregate normally pump with considerably less pressure than those containing either perlite or sand. Remember, high hose pressure results in loi/cr capacity and more machine wear. 3estwa.ll gun plasters are formulated to pump with as lev; pressure as possible and at the same time worl: good 'under the tools after being sprayed on the wall or ceiling. Spraying Acoustical Plaster Eestwall Light Acoustical plaster was fornuiatee especially for machine application. It works well in all type machines. Hose pressure is not normally a problem with this type plaster as it pumps easily with a low pressure. The Nozzle* 2 3 The nozzle of all plaster machines are basically the some. The mortar goes through an orifice, most have several interchangeable orifices varying ir. diameter frem 1/U" to 5/8". Compressed air is fed to the nozzle. The mount of air, consistency and type of mi.:, volume of mix and size of orifice determine the spray pattern. The nozzle operates by emitting a globule of mortar, then air, then mortar. Low frequency of this cycle results in large globules of mortar while high frequency results in very snail globules. To lower frequency: (1) Use lower air pressure (2) Use larger orifice (3) If air stem is adjustable, use greater distance from air stem to orifice. To increase frequency, resulting in finer spray pattern, reverse above procedure. h.0133 SGP OOl^24 `lover.be r 1, 1958