CLEANLINESS OF FIRST IMPORTANCE
Glue is extremely sensitive to impurities.
Cultures of germs are grown by bacteriologists in gelatine glue because they afford an ideal breeding place for germs.
Glue quickly absorbs odors, and decays rapidly if exposed to impurities.
Decayed or decaying glue is not only extremely unpleasant to handle, but it is worthless to work with. Keep your glue clean. Keep it away from strong odors. Glue will keep sweet and clean before melting just as long as you care to keep it so.
KEEP GLUE-ROOM WARM AND FREE FROM DRAFTS
Glue can not be expected to do good work if not kept at uniform temperature. See that the glue-room is of a temperature that facilitates uniform consistency of glue. Avoid possibility of drafts and consequent chilling of the melted glue.
Do not let glue freeze. If glue-jelly is frozen through it will crumble and act about like overheated glue. Glue frozen only around the edges does not show pronounced deterioration. Do not take any chances. Keep the glue-room temperature above freezing at all times.
USE BY WEIGHT
Glue is sold by the pound and should be used by the pound. Weigh not only the glue, but weigh the water as well. Keep an accurate record of weights.