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Hardwood Record — Veneer & Panel Section 



January 25, 1921 



Walnut Manufacturers to Continue Publicity 



The annual meeting of the American Walnut Manu- 

 facturers Association was held at the Association offices 

 in Chicago on Thursday, January 20. The point of prin- 

 cipal importance is the decision to continue publicity in 

 behalf of walnut. The decision was based on the very 

 satisfactory record made by the campaign during the 

 past years. Members w^ere much gratified by the appar- 

 ent public interest in walnut as manifested directly through 

 the increasing showing of walnut goods at the furniture 

 market at Grand Rapids and Chicago. The efforts of the 

 Association to increase interest in walnut have centered 

 largely about the necessity for convincing the public that 

 the walnut supply is adequate to meet present and future 

 requirements. Already the growing call for walnut fur- 

 niture has resulted in quite extensive installation of walnut 

 interiors in pretentious public buildings of all kinds. 



The following officers were elected for the coming year: 



President, L. C. Moschel, Langton Lumber Co., Pekin, 

 111. 



Vice President, V. L. Clark, Des Moines Saw Mill Co., 

 Des Moines, Iowa. 



Treasurer, H. B. Sale, Hoffman Bros. Co., Fort Wayne, 

 Ind. 



Secretary-Manager, George N. Lamb, Chicago, 111. 



Relative Merits of Thick and Thin Veneer Stock 



In the interest of one of its readers. Hardwood Record 

 published in the Dec. 25 issue a suggestion for a discus- 

 sion by the trade of the relative merits of veneer thick- 



SERVICE 



QUALITY 



Buy Direct from the Manufacturer 



Mahogany Oak Walnut 



The Dean - Spicker Co. 



22nd St. and So. Crawford Ave., Chicago, III. 



nesses in built-up stock, such as the panels of veneered 

 doors. The first reply to this suggestion comes from 

 Forest Products Laboratory at Madison, Wis. it is as 

 follows: 



"It is true that thick layers of wood when glued to each 

 other with the grain of adjacent plies at right angles, as 

 in plywood, do develop greater stresses upon glue joints 

 than thin veneers with a given change in moisture content. 

 This has been shown very clearly in connection with the 

 manufacture and testing of water resistant plywood for 

 aircraft purposes. With an increase in the thickness of 

 the veneer it becomes more difficult to manufacture ply- 

 wood that will withstand severe water resistant tests. With 

 good gluing methods 1 I 6 inch veneer and less can be 

 made to pass very severe tests, while with i/12 inch ma- 

 terial a large percentage of failures usually occur, and with 

 still thicker stock it is even more difficult to obtain highly 

 water-resistant panels. With the thick veneer the stresses 

 become so great that the glue joint is often ruptured. 

 These statements pertain to plywood made from veneer of 

 low moisture content and with water-resistant glues. 



"The thickness of the veneer along with other factors 

 determine the rate of change in moisture content which is 

 largely responsible for the permanency of the glue joint. 

 The total percentage of change in the moisture content 

 is, of course, also important. The thicker veneer, such as 

 '/i inch is claimed by some manufacturers to keep out the 

 moisture from the glue joint. While this tendency 

 doubtless exists to some extent, it applies only within cer- 

 tain limits. The moisture content of a veneer I/4 inch 

 thick does not change as quickly as one J/g inch and less; 

 however, if exposed for long enough time to a constant 

 set of conditions, the J4 inch will eventually come to the 

 same moisture content as the thinner veneer and will then 

 exert a very much greater force on the glue joint. For 



