September 10, 1919 



Hardwood Record — Veneer & Panel Section 



29 



How Various Glues Are Mixed 



Useful Directions Regarding Certus, Napco, Casco and Other Glue 



T"IE following articles are descriptions from vari- 

 ous companies showing methods of mixing their 

 respective glues. 



MIXING CERTUS GLUE 

 In general, use about 10 parts of glue and 17 to 20 

 parts of water. Both water and glue should be weighed, 

 not measured. With the water in the mixing can, start 

 the mixing blade at high speed (80 to 140 revolutions 

 per minute of the vertical shaft is about right) and add 

 the dry glue rather slowly. Continue this rapid stirring 

 for about 3 to 5 minutes after the last dry glue is added, 

 then stop the mixer, scrape down the sides of the can, 

 and start mixing at slow speed (40 to 60 revolutions per 

 minute of the vertical shaft is about right) . After 1 to 

 1 5 minutes at slow speed the glue should be ready for 

 use. If it has a granular appearance at the end of this 

 time, however, the casein is not all dissolved, and mixing 

 should be continued long enough to get the casein par- 

 ticles into solution. The glue is then ready to use. 



NAPCO GLUE 



In general, use about 1 parts of glue and 17 to 20 

 parts of water. Both water and glue should be weighed, 

 not measured. With the water in the mixing can, start 

 the mixing blade at high speed (80 to 140 revolutions 

 per minute of the vertical shaft is about right) and add 

 the dry glue rather slowly. The glue should not be added 

 any faster than the water will take it up. Continue this 

 rapid stirring for about 3 to 5 minutes after the last dry 

 glue is added, then stop the mixer, scrape down the sides 

 of the can, and start mixing at slow speed (40 to 60 revo- 

 lutions per minute of the vertical shaft is about right). 

 After about 15 to 30 minutes at slow speed the glue 

 should be ready for use. If the glue is not completely 

 dissolved at the end of this time, however, the mixing 

 should be continued long enough to get the particles into 

 solution. When the mixer is finally stopped, the glue 

 should be permitted to stand for about 20 minutes. It 

 is then ready to use. 



CASCO GLUE 



Directions for mixing Casco Waterproof Glue are as 

 follows: 



1st — Pour into the mixer two pounds of cold water for 

 each pound of glue. 



2d — Add the powdered glue to the cold water slowly, 

 while agitating vigorously to prevent lumps. 



3d — Allow to stand for fifteen minutes, and use in the 

 spreaders or with brush exactly as any other glue. 



4th — The mixed glue will keep liquid for a full work- 

 ing day. 



After the powdered glue has all been added to the 



w^ater, the stirring can be continued for a minute or two 

 and then the glue allowed to stand. It is not necessary 

 to continue the mixing for a period of fifteen minutes. 



For small quantities, such as sample quantities, an egg 

 beater is used to advantage. For regular working quan- 

 tities, hand mixers holding about a gallon and a half, and 

 power mixers from two and one-half gallons to seventy- 

 five gallons, are used, Full information regarding mixers 

 for different quantities can be obtained from the manu- 

 facturers of Casco. 



PERKINS' WATERPROOF CAESIN GLUE 



When the paddle itself is running about 400 revolu- 

 tions per minute the following method is highly satisfac- 

 tory for making up Perkins' waterproof glue into finished 

 glue. 



Dissolve one pound of 76 per cent caustic soda in 30 

 pounds of water contained in the large bowl. Add four- 

 teen pounds of Perkins' waterproof glue slowly to the 

 caustic solution with thorough and brisk agitation. Con- 

 tinue agitation for about five minutes. Allow the glue 

 to stand 20 to 30 minutes after mixing, before using. 



When the speed of the paddle itself is less than 400 

 revolutions per minute the following method will give a 

 smooth, fine flowing batch. 



Add 14 pounds of Perkins' waterproof glue to 27 

 pounds of water. Agitate to smooth consistency. Con- 

 tinue agitation and add in small portions a solution made 

 by dissolving 1 pound of caustic soda in 3 pounds of 

 water. Continue agitation for about 5 minutes after 

 ingredients are all in. Allow to stand 20 or 30 minute* 

 after mixing, before using. 



Veneer stock should be dried until it contains only from three 

 to five per cent of moisture and should then remain in ordinary 

 atmosphere until it takes up whatever moisture it will absorb from 

 the air. No matter how dry it is made, it will not long remain 

 much dryer than the air in contact with it, but if it contains more 

 moisture than the air, it will take some time to bring it down to 

 atmospheric dryness by air seasoning alone. It is well known 

 that the last moisture remaining in a piece of wood is the most 

 difficult to extract, and in that respect it makes little difference 

 as to temperature, provided the air is dry that surrounds the wood. 



Work is progressing nicely on the new veneer plant enlarge- 

 ments at the Louisville Veneer Mills, Louisville, Ky. Harry Kline 

 of that company reports a very active demand and capacity pro- 

 duction. 



Slow deliveries of machinery have held back completion of the 

 new plant of the Wood-Mosaic Company at Highland Park, Ky., 

 which will manufacture veneers. The company is also installing 

 a plant to manufacture cores. 



Howard C. Hobbs, formerly with the New Albany Veneering 

 Company, New Albany, Ind., has resigned and gone with the 

 Louisville veneer department of the Wood-Mo.saic Company. 



