The invention relates to a resin impregnated paper substrate with crystalline triazine, preferable vapor deposited triazine. The crystalline triazine preferably is present in an amount of about 5 g/m2 or higher and about 100 g/m2 or lower. The invention further relates to a process for making a laminate comprising at least one cured layer of amine-formaldehyde resin and a paper, wherein a resin impregnated paper with vapor deposited triazine is submitted with one or more other layers to pressure and/or sufficient temperature to cure the resin and at least part of the triazine.