All slates require an excellent accepted concerning skill and experience upon the part of the slater. The most important components of this is taking care in order to manage with the dimensional variations from slate to slate. At create it easier and therefore to guarantee the slating cost is reasonable; limits are set on the variations in extent; width; side straightness; rectangularity; flatness as well as thickness; and there tend to be tests per among these. Most of these restraints do not apply in order to random size slates as their dimensions tend to be undefined.

knowledge and know how of the slater