Operation | A series of liquid mixtures (whose values of wettability are known) are used; the mixture that is at the threshold of drop formation and indicates the wettability value of the solid is looked for. | You draw with the pen a line of about 5 cm. | You draw with the marker a line and the ink remains permanently spread on the treated area. |
Type of test | Measure the tension giving precise values of treatment | Quick test: measure if the liquid remains spread for at least 2 seconds | Quick test: treated / non-treated (the ink quickly dry and remains permanently spread on the treated zones) |
User | Quality Laboratory | Production operator | Production operator |
Composition | Mixture of Formamide and Cellosolve, "Du Pont Victoria Pure Bleu 80" dye (ASTM D procedure 2578-84) | Mixed solvent containing the following functional groups: alcohol, glycol ether, carboxylate, amide and different amounts of water. | Mixture with ethanol |
Warnings for use | Components attack the skin, so you must avoid any direct contact and you must protect the eyes. | Non Toxic | Components can cause eyes irritation, so you must avoid any direct contact and wear personal protection equipment. Flammable liquid. |
Packaging | 8 small bottles, ml. | In packs of 10 + 1 free | In packs of 10 + 1 free |