Document 6bwxNvYV8OmN8172Vr22Rvm1R

24 gr. Ballistite at 100 >ard.' showed a penetration of 2", leaving a hole 2^" in diameter. "But how about the hand grenade?" says the trapshooter who ponders. He gets the manikin and buckshot idea readily, but a small object like a hand grenade hurtling through the air not unlike a clay target seemingly presents no fitting surface for coarse shot and the regulation 7}- chilled load--l1^ oz. with 431 pellets to the charge and at 45 yards in a 30" circle 323 available from a 75^ choke or 249 in an improved cylinder, while it would undoubtedly connect with the grenade would hardly do the business desired. Well, the writer was a bit dubious on this point, too, and to strike a happy medium, secured some shells loaded with 3Gj dr. Du Pont and 1 oz. BB shot--50 to the load. The test was made on in-coming targets thrown from a hand trap 45 yards away and the score, charges centered, was 19 x 25 which included two half bricks pulverized. This was done with a single load, which would indicate that a number of shooters with full magazines could connect with every hand grenade coming over. At any rate the practice, if not already in vogue, could in-tructively be followed up at our cantonments where the different phases of trench warfare are being taught, and it is possible that the regular buckshot load will give a startling account of itself on the smaller in-coming objects. In fact, dummy or unloaded grenades coultl be thrown as well as clay targets and results noted on the former. This too would assist in timing the clay target according to the speed of the hand-thrown grenade---a mere matter of adjusting the spring of the hand trap. It is indeed a great source of pride and satisfaction for the trapshooter to suddenly awaken to the fact that this favorite sport has taken such a remarkable position in the stern work which must spell freedom. Nor can he be other than alive to the realization that he is a dependable, finished marksman of the Home Guard whose duty it is to encourage and coach the new shooter to a like condition of efficiency. There are said to be 400.000 trapshooters in the I'nited States, and if everyone could appreciate his own value as a home defender to the point of securing one recruit, what a formidable army it would be. >^1 tj i l I Apply Industrial Paints E. W. Tomlinson INISHING materials commonly known as paints F are prime essentials in many industries, for it is important that most finished articles be rience in the manipulation of colors: the paint when applied to a surface would chalk and rub off after the oil in which it was mixed started to deteriorate. If given a protective and beautifying coat of some it did not chalk, it would crack or alligator, and sort. The many finishes of this general class differ these irritating difficulties were such as to cause the most widely from the materials used but a few user to shift the problems upon the paint manufacturer. years ago. During this period the paint manufacturer was In the earlier days paint was just paint, and the absorbed in the problem of manufacturing suitable manufacturers used lead ground in linseed oil almost materials for use on wood for building purposes, and exclusively for the painting of their manufactured as a consequence allowed this great question pertain products. They purchased colors in their dry state ing to the manufacturing of industrial paints pass with and ground them and lead together to obtain the dif out any particular thought for some time. ferent shades of color desired. Lead was always con The user during this period became more dissatis sidered the principal base or foundation upon which to fied with these conditions and decided to put the prob build the color, and unless at least a portion of lead lem up to the paint manufacturer, who in turn was was used, the finished product was considered inefficient. quick to grasp the situation, as he realized a great pos Despite the fact that sibility that meant much to care was taken in selecting his future success had been what was considered the overlooked, and at once set best materials there was out to eliminate the dif constant irritation, trouble, ficulties. and expense. It was diffi This was a slow and cult to maintain a standard tedious task as the compli "of colors at all times, due cations were many from to the small mixes made in both technical and practical each instance and the varia standpoints, due to the fact tion in strength of the colors that most manufactured used to obtain the shade commodities required a spe desired. The man who cial paint, and in numerous mixed these colors knew instances manufacturers of well how they should be ap a certain article would not plied, but lacked both prac use a standard paint owing tical and technical expe Induttri*] P&ints nr* Given Severe Tests on Farm Machinery to difference in opinion DUP 000268 10 Du Pont Magazine July, 1918 "miming iulit nm~. Tin1 paint manufacturer's 'boulders were broad and In- muld and did stand many a hard dump until he had thoroughly convinced the industrial paint user that while lead u:i' very essential and necessary in the manufacture of paint for industrial products, yet through the use of other pigments in connection with lead, he could produce an article far 'tiperior to pure lead and oil. This accomplished, it gave the U'cr time to think about more trouble' and greater pos-ibilities for the paint manufacturer. The paint had been applied with brush, which was a slow and necessarily expensive process due to the labor involved. Something must be done to speed up the application of the paint and to cut down the labor overhead expense. Again the paint-manufacturer was consulted; he in turn realized that this meant, in part at least, the undoing of what he had worked so hard to accomplish, for the reason that the paint he was furnishing was manufactured to apply by brush. "We must speed up our painting department, get this work out faster and with less expense," the user said. "We will give you a paint into which you can dip your articles," said the paint manufacturer. Leak-proof tank' were installed and the user at once approved the system which enabled him to m< re than triple lus output with at IcaM 4(1' i hern-;,..,. m labor. The dip tank was hi,' friend and here to ^ta\ as a permanent fixture. The paint would stand more reduction when usetl for dip than when brushed, an<l as a consequence would cover more surface per gallon and cut down his ready-for-use cost. It was no' possible to obtain quite as heavy a coat of paint on the surface as when brushed but the paint manufacturer increased the capacity or hiding power to such an ex tent that it gave the dipped articles sufficient and proper covering. At the time the first tanks were installed, it neces'itated much stirring of the paint by hand with paddles to keep the mixture uniform throughout. This wa>: especially true after the paint was allowed to stand unused for any length of time. The paint manufacturer at once originated a dipping tank which contained an agitator run by power. This internal revolving device kept the paint in suspension and the paint in uniform condition. He also manufactured the industrial paints lighter in gravity which prevented settling of the pig ments and practically eliminated the difficulties in this phase of the work. The speed with which articles could be coated by the dip process almost staggered the users and they icalized that it was necc"ary to install some equipment DUP 000269 A Portion of the Finishing Room of * Large Plant --Here the Heavy Parts are Given a Coat of a Carefully Prepared Paint ' J1 '* ---- Bmter Parts Drying After Dip in a Tank of Paint by which they could transfer the articles more rapidly from the erection rooms to the dip tanks, and in turn relieve the congestion after material was dipped. This was accomplished by installing overhead track or trolley systems. Articles after being erected are placed upon this device, suspended, and run to the dipping tanks, lowered into the paint and again raised to the track by hoists and transferred to drying rooms. If the articles were to be striped, this is done while they still were suspended, but thoroughly dry. They were then transferred to varnish tanks and received their finish ing coat. Several implement manufacturing plants have so perfected this system that after articles are erected and placed upon the track system, they do not again touch the floor until they are placed in cars for shipment. One of the largest gas engine manu facturers in the United States places their smaller engines upon this track system after being erected, and are then transferred to the different painting depart ments. In this process the filler coat is applied by air >pray, and after it is'dry and sanded, the other coatings are applied in the same manner, and the engines trans ferred to the shipping department where they are crated and shipped. The electrical-driven truck h another device which is being used for transferring articles to and from these dip tanks and other painting devices. Even with all of these improvements the paint manufacturer's troubles were not at an end, for no sooner were these systems perfected than they were called upon to solve a still more difficult problem. There were numerous articles which still had to be coated by brush. One reason for this was that by the dipping process, the paint might injure mechanical parts. Also, numerous articles are not painted until erected, and in many instances received two or more different colors in finishing. This was quite a problem to the paint manufacturer, but after some time it was solved by the introduction of the air brush or spray machine that deposits the paint on objects in the form of a fine spray or mist. There are several types of these machines on the market today that are giving the best of satisfaction. This spray system is being used for painting gas engines, auto parts, freight cars, tractors, varnishing furniture, aeroplanes, boats and hundreds of other articles. As new industries were established the paint manu facturer was called on to meet many additional re quirement' of paint. DUP 000270 12 Du Pont Magazine July. 1<*IS Himi'vrr. with tin1 manv improvements in :: Method- of the appm-ation "i paint. 'nun' u-ors were -rill nut -ati-hed iimns to -pectai requirements whicii made it imperative to -peed up the 'irving :tti<l harden ing "t the paint- anil enamel-. To accomplish tin-'' -pci'inl rutniition- baking ovens were m-tailcd .uni in 1)i-h tin' dipped or -prayed article- were placed where (lev vm baked at a temperature varying from 12a r.i 41 k ) degrees Fahrenheit. `amending upon the eoiur and nature of the product and of tin- paint u.-ed. Tin' irtiea- were ailowed to remain m tia-e oven- from one to four hour- ami tneu rettioved. Fnameis receiving tin- treatment are made -petaliy tor this purpo-e ami are entirely different from the so-called air-drying enamel-. The baking proce-s produces a hard durable lim.-h. the lu-tre of which can be varied as desired. The-*- baking ovens are made of steel and are lined with a.-br-to- m order to retain the heat ami maintain the du-ired temperature. They are heated by g:;s. e[e'-Tririty or -team. Auto mobile manufacturers tn-tailed drying rooms to -peed up the drying of the dnTerent '-oatiug- applied. Pa-- 'Ugi t * ' 11111 i ies a 11 r 1 ' a ng p mm i rooms to ha-ten the >!rv.ng. For -reel i-oaein - and main ..r -'in - :n:.ar -m...; aU'l IV'iii products it ha.- been ueee--arv :> develop rini-m- to mutate rare and i \peii-ive woou-. -iii ' "--fuiiy lias 'lie re-earrh atl'-l experimental work been oniiUUcted that it is now praetieally itnpo-sihle to deter!, bv tiie eve alone, the difference i'etween f'r.e rim-hed -leei and he natural wood. Several different not- and material- are ri'ipaired. and the art ,.f ..ppueatiun reipnre' die most exacting care. The othee building nipuri- 'he -ame ejaiiorafe rim-iie- in decorating the metai doors and trim, ami in many > a.-es f,,r hni-iung -teel eabuieis and furniture. . Hue mav not be -urpri-ed to see. in the near future, artieies painted upon -ome movable deviee. -imiiar to die modern movable -tairs seen in -ome oi the modern department .-tores. Once the artieies are placed upon dii- deviee. thrv will receive their routing- of paint and will .ome out dry and finished products in so tar as the paint is concerned. Making Nitroglycerin HE mental attitude produced by the mere mention T of nitroglycerin is one that is inclined to ob scure the real origin of the compound. While it is exceedingly sensitive and violent in its action, it is de rived from quite simple and well-known chemicals. The prime basis is nothing more than glycerin--the -ame -imple glycerin that is purchased from the drug .-tore and used for a variety of medicinal purposes about the homo. This light, oily material is obtained most iargeiy as a by-product in the manufacture of ,-oap. and is therefore better known among the civilized people than among the unwashed savage tribes. It is ob tained from the -pent lye water by careful systems of -eparation. and is then refined or purified in keep ing with the use for whieh it i- in tended. The conversion of this simple ma terial into one of the strongest ex plosives is brought about by the ac tion of nitric and sulphuric acid- in somewhat the same way as cotton is converted into gun cotton. The nitric acid is the one that really does the work, but the sul phuric acid is needed to collect the water that is formed when tire nitric acid attacks the glycerin, thereby preventing the weakening of the acid and the attend ing -lowing down or stopping the action. In actual operation on manufacturing plants the processes are exceedingly simple in plan but require the most painstaking care to details in order to avoid pos-ibili t ie- of danger. Definite amounts of the two acids, borh of which have been described in arti cles already pub lished in this mag azine. arc weighed and mixed. This mixture i- varied to suit the differ ent variations that are to be de veloped in the fin ished glycerin. The nitrating is done in large, co ni parat i vel y shallow steel tanks that are lined with cold brine coils and -uppii" ' w;th DUP 000271 a piriini] Ui:J DU PONT AMERICAN INDUSTRIES aiiiiiiii For the convenience of buyers considering the purchase of any Du Pont product, and desiring specific information, this coupon is printed. Upon receipt, it will be forwarded immediately to the proper office for attention. Fill in, Cut Out and Mail This Coupon M iM I (Du Pont Magazine, JiI> . 'is; Sales Promotion Division Date E. I. du Pont de Nemours & Co. Wilmington, Delaware EXPLOSIVES 3 Blasting Powder Blasting Supplies O Charcoal Clay Mining Farm Explosives Cl Industrial Dynamites Land Clearing Permissible Explosives Cl Refined Nitrate of Soda 3 Road Building Saltpetre 3 Tree Planting Cl Wood Pulp PAINTS 3 Antoxide Iron Paint Auto Finish Auto Paints and F.namels Bam Paint Bridgeport Standard Paint Bridgeport Wood Finishes 3 Colors in Oil Concrete Paint Decorative Stains Cl Dulite for Mills Enamels Ferro-Keep (Metal Paint) Cl Floor Paints Floor Varnishes Flowkote Enamel Cl Industrial Paints Japans 3 Marine Paints Railway Paints 3 Red Lead 3 Sanitary Wall Finish 3 Shellac 3 Shingle Stain Smokestack Paint Town and Country Paint Varnishes Vitrolac Stain Finish Vitrolac Varnish Wagon and Carriage Paint 3 Wheeler's Wood Filler Wire Screen Paint SPORTING POWDERS 3 Black Sporting Powder Hand Trap Hunting Pistol Smokeless Powder O Resort Shooting 3 Rifle Smokeless Powder Shooting in Colleges Cl Shooting on Boats Smokeless Powder Trapshooting CHEMICALS 3 Acids CJ Alums 3 Bari um Chloride 3 Belt Cement 3 Beniol Products 3 Blanc Fixe 3 Bronze Powder 3 Bronzing Liquids 3 Carpolene (Wood Preservative; Carpo (Metal Paint) Coke 3 Creosote 3 Dead Oil 3 Distilled Water 3 Dry Colors 3 Ether 3 Heavy Chemicals 3 Household Cement 3 Leather Renovators 3 Leather Substitute Solutions 3 Litharge 3 Lithopone 3 Mantle Dips Metal Lacquer Nitre Cake C Parlodion 3 Patent Leather Solutions 3 Pegamoid Aluminum Paint Pitch 3 Pontar 3 Pontoklene 3 Pulp Colors 3 Py-ra-lin Enamel 3 Pyroxylin Solutions 3 Rubber Makers White 3 Salt Cake 3 Shingle Oil 3 Solvents 3 Split Leather Solutions 3 Waterproof Cement 3 White Lead 3 Wood Lacquer 3 Wood Oil PY-RA-LIN 3 Brushes 3 Challenge Cleanable Collars 3 Colored Sheeting 3 Combs 3 Desk Sets 3 Manicure Sets 3 Mirrors 3 Novelty Sheeting 3 Py-ra-lin Pipe Bits 3 Py-ra-lin Rods and Tubes 3 Py-ra-lin Specialties 3 Py-ra-lin Toilet Goods 3 Toilet Sets 3 Transparent Sheeting COATED TEXTILES 3 Auto Truck Special Fabrikoid 3 Book-Finish Fabrikoid 3 Buggy Aprons Craftsman Fabnkoid 3 Fabrikoid for Baggage 3 Fabnkoid for Home Uses 3 Fabnkoid for Railway Uphol stery and Vestibule Curtains 3 Fabnkoid for Upholstering 3 Fabnkoid Sheering 3 Fairfield Rubber Coated Cloth 3 Hat Sweat Material 3 Marine Special (U. S. Standard) Fabnkoid 3 Motor Fabnkoid 3 Rayntite Fabnkoid Auto Top Material 3 Rug Anchor 3 Shoe Fabnkoid Name....................................... Position Your Address (If Personal).. ......... Name of Concern (If Company) Address of Company ........ ....................... BUSINESS: Z Manufacturer; Z Producer; Jobber; Z Dealer; Z Consumer. (Check which) What Du Pont products do you sell''.................. // a user, for what purpose does the product checked, or that which you now use, interest you ? ...................... Specific Questions Should Be Asked In An Accompanying Letter Null! * nni DUP 000272 ff