Hemp yarn greatly increased in volume with exposure to moisture, so that a canvas will be seriously distorted by changes humidity. This consequently affects the preservation of paintings.
About the difference between hemp and cannabis know that hemp moisture swell even more.
Various layers of drying time to change the tone of the pigment can not influence. Does the number of layers and many other conditions.
About craquelure can only say that it is necessary to change the solvents kazhogo layer and the drying temperature. This is my "know how", the result of experiments and just random errors, sorry, the details of the method can not describe.
Experiment
