Store covered in refrigerator. When you're ready to use the glue, prepare the joint, and assemble all the clamps, cauls, and fixtures you'll need. Place a small chunk of cold glue in 1-2 oz. Use glue when it melts. After use, discard plastic cup, applicator and leftover glue.
Applicator can be cheap brush, Q-tip, etc.
Hide glue is derived from the collagen found in animal hides. It is very similar to the gelatin we eat and is not toxic . In the U.S. edible gelatin is made from pork skins and hide glue from beef hides. The higher the gram strength, the stronger the cured glue, and the shorter the working or gel time. It is never a good idea to dilute too strong a glue to obtain lower viscosity or longer working time when it is possible to use a lower grade of glue.