24 



Hardwood Record — Veneer & Panel Section 



May 10, 1919 



TRADE MARK Rt6. 



*>inillNltll[3lllinilllltC]IIIIIMlMIIC]llllllllllll[]IIIIIIIIIIMC]llltllllllllC]lllllll)IIIIC]MIIIIIIIM 



j Certus Cold Glue | 



I (The Original Water-proof Glue) | 



Joint Glue remaining liquid a I 

 full working day after mix- | 



ing- I 



1. Highest adhesive and wa- | 

 ter resisting quality. | 



2. In comparison lowest | 

 priced glue on the mar- | 

 ket. I 



I 3. Saves time, labor, heat | 



I and trouble. | 



I 4. When mixed with cold | 



I water ready for use in | 



I 15 minutes. | 



I 5. Suitable for all outside | 



I gluing even in cold and | 



I wet weather. I 



a § 



I 6. ]\ray be used in jointing | 



I machines. i 



I 7. Glues natural damp (not | 



I wet or green) as well as | 



I dry lumber, steel, brass, | 



I stone, glass, linoleum, | 



I cork, cloth, etc., to wood | 



I and leather. | 



I 8. Stands all climates, even | 



I the most humid. | 



i 9. Especially adaptable for | 



I use in gluing hardwoods | 



I of all kinds. | 



I 10. Uniform government in- | 



I spected and sealed. | 



3 Write for sample for testing on your special work. Our services 3 

 = are at your disposal. = 



I CERTUS COLD GLUE CO. | 



I DETROIT, MICH. j 



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shows little checking or splitting, and not many woods 

 are so free from warping. These qualities are valued 

 by manufacturers of furniture, musical instruments, and 

 other commodities which employ large panels of built-up 

 stock. Yellow poplar cores or backing are among the 

 best, because after they have been properly made, they 

 give little trouble because of checking or warping. This 

 wood is considered the equal of white pine as the cores 

 of panels, and that is about as high a compliment as can 

 be passed on any wood. 



One of the most sterling qualities of yellow^ poplar 

 remains to be mentioned: its ability to take a fine finish. 

 It ranks with the very best in that respect. It may be 

 polished to such smoothness that it takes paint as satis- 

 factorily as sheet metal. It would be difficult to name 

 any wood superior to yellow poplar in that respect. TTie 

 best examples of it are seen in fine carriage bodies which 

 are polished till they reflect like mirrors. In panel work 

 like that, yellow poplar is often the outside, visible por- 

 tion, as well as the invisible core; but in panels of some 

 other kinds, it is the inner portion while mahogany, wal- 

 nut, oak or some other figured wood constitutes the sur- 

 face. Yellow poplar has no figure, and if a figured sur- 

 face is w^anted some other w^ood must supply it. But 

 for the want of figure, yello^v poplar would be seen in 

 fine finished work much oftener than it is. But it is too 

 much to expect that all the excellent qualities are to be 

 found in one wood. Yellow poplar has been otherwise 

 so liberally endowed by nature that the absence of figure 

 is not much noticed. 



Simple Precautions for Glue Users 



In the development of advanced practices in panel construction, 

 it is important that the simple fundamental rules be not forgotten. 

 Regardless of the requirements of more elaborate methods, panel 

 men should always have before them the fundamental things, neg- 

 lect of which spells failure. 



In using hide glue there are a number of precautions that must 

 be observed if satisfactory results are to be obtained. By improper 

 use a very high-grade glue may be made to give poor joints. It is 

 important first to find out the right proportion of glue and water 

 to use to get the best results with the wood being used and the 

 conditions under which the work is being done. This is largely 

 a matter of experience, but it can also be determined by strength 

 tests. When the right proportions have been decided upon they 

 should be strictly adhered to thereafter, and the glue and v^fater 

 should be weighed out when making up a new batch of glue 

 rather than measured or guessed at. Clean cold water should be 

 used and the mixture thoroughly stirred to prevent lumps. It 

 should then stand in a cool place until the glue is thoroughly 

 water-soaked and softened. This may take only an hour or two, 

 or it may take all night, depending upon the size of the glue 

 particles. It should then be melted over a water bath, and the 

 temperature not allowed to go higher than about 150° F. High 

 temperatures and long continued heating reduce the strength of 

 the glue solution and are to be avoided. The glue pot should be 

 kept covered as much as possible in order to prevent the forma- 

 tion of a skin or scum over the surface of the glue. 



The room in which the glue is used should be as warm as pos- 

 sible without causing too much discomfort to the workmen, and 

 it should be free from draughts. In a cold, draughty room the 



