| CHAPTER I | |
| IMPORTANCE OF THE INDUSTRY | |
| Glue industry founded in America by Peter Cooper — increase in capital invested — increase in production — variety of uses — increase in requirements | [Page 15] |
| CHAPTER II | |
| THE MANUFACTURE OF GLUE | |
| Sources from which glue is made — boiling the stock — drying — preparation in commercial form | [Page 17] |
| CHAPTER III | |
| TESTING AND GRADING GLUE | |
| Grades established by Peter Cooper — the tests — viscosity or fluidity test — the jelly test — apparatus for making jelly test — the finger test — a simple, practical test for glue users — sampling — bubbles — surface indications — color indications — alkaline or acid quality — breaking quality — foam — grease — keeping properties — odor — laboratory test | [Page 25] |
| CHAPTER IV | |
| CORRECT METHODS IN THE GLUE-ROOM | |
| Much waste through faulty methods — importance of correct practice — soak glue in cold water before melting — test glue by water absorption — appliance for water absorption test — melting or dissolving glue — do not heat higher than 150° F. — apply heat indirectly — live steam ruins glue — use thermometer — heat glue slowly — cleaning the melting pot — importance of using copper, brass or aluminum utensils — guard against evaporation — melt only the amount required — importance of cleanliness — keeping the glue-room warm — use by weight — storing — applying glue — securing workers’ co-operation | [Page 43] |
| CHAPTER V | |
| MODERN GLUE-ROOM EQUIPMENT | |
| Modern appliances now available for all users — only copper, brass or aluminum should come in contact with glue — the scientific glue-heater — the automatic temperature controller — keep steam away from glue — glue spreaders — clamps and presses — distributing glue in large plants | [Page 65] |
| CHAPTER VI | |
| WHICH GLUE TO USE | |
| Accurate records important — the best glue for wood joints — veneers — sizing — paper boxes — belting and other leather goods — bookbinding — emery purposes — how much to pay — waterproof glue — vegetable glue — quick-setting glue — flexible glue | [Page 79] |
THE GLUE BOOK
CHAPTER I
IMPORTANCE OF THE INDUSTRY
Glue is now so extensively used, and for so many different purposes, that it certainly deserves much more intelligent treatment at the hands of users than it has received heretofore.
Since 1837, in which year Peter Cooper, who may justly be regarded as the founder of the glue-making industry in the United States, produced the first American-made glue, the yearly output has steadily increased.
By 1880, the amount of capital invested in the making of glue had reached $4,000,000. In 1905, it was $10,000,000, and is now between $12,000,000 and $13,000,000.
The annual production has increased in about the same ratio. In 1880, it was $4,000,000; at present it is about $15,000,000.
Glue is an important by-product of the great packing houses. Those in touch with the industry know how extensively glue enters into the manufacture of articles of everyday use. The general public hardly realizes that glue is used not only in making wood-joints and veneers, but in the production of paper, of silks, hats, carpets, rugs, and hundreds of other necessities.
America now produces glue of excellent quality to meet practically all requirements. So great are the requirements that almost the entire amount of the American-made glue is absorbed by the home demand.