May 10, 1917 



Hardwood Record — Veneer & Panel Section 



27 



"It is interesting to know, too, that methods of this kind 

 really promote economy. Although I have a reputation 

 for buying unusually expensive gues, I think that when 

 the cost is figured on the basis of footage of wfork pro- 

 duced, my costs will be lower than those of nearly any- 

 body else in the business. I know w^hat my glue vfiW do, 

 and I use it on the basis of its ability to accomplish results, 

 and not by guess. Manufacturers who are having glue 

 problems would find their work simplified by adopting the 

 plan of testing all of this material used." G. D. C, Jr. 



Letters from a Panel User 



Monroe, Mich., May 4. There are many kinds of glue manu- 

 factured under the names of fish, bone, ossien and hide, produced 

 from fish scales and bones, moss and sea ^veed, bones of ani- 

 mals, scraps of hides, tendons and sinews, rabbit skins, parch- 

 ment, old kid gloves, etc. We will confine our discussion to 

 hide glue. 



It may interest readers to learn that the first essential in the 

 manufacture of glue is the proper blending of the ra-w material. 

 There are six principal sources of supply, each having its own 

 rndividual characteristics, consisting of hides raised in South 

 America, Texas, Mexico, East Indies, China and coming fronr 

 packing houses and other establishments. It is the gluemaker's 

 object to carefully blend these very divergent classes of hide stock 

 to produce the requisite article. 



High foaming properties are especially objectionable in glues 

 that are applied to the work by mechanical means. Here the roll 

 or brush agitates the glue solution to such an extent that a froth, 

 a mixture of glue and air is the result, with a consequent reduc- 

 tion in the binding power of the glue. 



It is quite possible to test glue for foam by means of an egg 

 beater or similar whipping device applied to a melted sample. It 

 is very important to take account of the temperature at which 

 this test is made. 



For panel work and other varieties of veneering a slow setting 

 glue is best. Of course, the dryness of the core stock as well as 

 the veneer is very important. We will, however, assume that 

 every panel and veneer manufacturer knows this and that con- 

 ditions of undried stock do not exist. When stating slow setting 

 I do not mean this to an extreme. Indeed, the quicker the glue 

 sets the stronger it is, so we do not want to suffer too much in the 

 strength of the glue because it is to our advanage to use a slow 

 setting glue. 



The test for spreading the glue consists in determining the quan- 

 tity of dry glue needed for coating a certain surface of wood. 

 This test is especially important for veneer work. Take a known 

 quantity of dry glue, soak in a known quantity of water, which 

 must be the same in temperature and quantity for all sorts of glue 

 tested. Then determine how many square feet of surface can be 

 coated evenly with the glue. Tests depending upon chemical 

 operation are absolutely worthless. 



Viscosity of the melted glue solution seems to be one of the 

 most commonly used and popular tests. It may be well to state, 

 though, that relation between viscosity and breaking strength of 

 glue is unmistakable. Viscosity test should not be taken as final 

 because hide glues of low jelly strength may show high viscosity. 

 It is best to determine and specify both jelly-strength and viscosity. 

 In general the jelly-strength is approximately proportional to 

 viscosity. A. T. DEINZER. 



There are many interesting power devices used in logging oper- 

 ations covering the ground from skidding in the woods to han- 

 dling on the mill yards, and with the offerings available in this 

 line it is no longer economy to handle logs in quantities by main 

 strength and awkwardness. 



All Three of Ui WUI Be BeneBlea if You Mention HARDWOOD RECORD 



FIGURED 

 RED GUM 



^ It is a significant fact that the 

 manufacturers whose lines in 

 Figured Gum have been the most 

 successful, used Louisville Fig- 

 ured Red Gum on their original 

 cases, and still do. 



^ Our long experience and spe- 

 cializing in Figured Red Gum 

 \'eneers and Panels qualifies us 

 to likewise serve you acceptably. 



^ If you are not familiar with 

 Louisville Figured Red Gum, let 

 us submit samples for inspection. 

 Choice figured wood at reason- 

 able prices. 



THE LOUISVILLE 

 VENEER MILLS 



More Than 28 Years' Experience 



LOUISVILLE. KENTUCKY 



