Method for demonstrating the capability of strengthening scalp and/or preventing dandruff

A method for demonstrating the capability of strengthening scalp and/or preventing dandruff of a personal care product or component thereof, the method comprising:

• (i) selecting a first portion of a solid porous article of non-animal origin, the solid porous article comprising artificial skin, polyurethane, fungi, sponge or a combination thereof;
• (ii) treating the first portion of the article with the personal care product or the component thereof;
• (iii) subjecting the treated first portion to a drying step;
• (iv) mechanically treating the dried first portion;
• and
• (v) assessing at least one attribute, visible to the naked eye, of the mechanically treated first portion,
• wherein the mechanically treating comprises combing, folding or a combination thereof, and wherein the assessed attribute is a change in the appearance of the mechanically treated first portion relative to untreated article and/or relative to a mechanically treated second portion and wherein, when the assessed attribute is a change in the appearance of the mechanically treated first portion relative to a mechanically treated second portion, the mechanically treated second portion is produced by selecting a second portion of the solid porous article, treating the second portion with a placebo product, subjecting the placebo product treated portion to a drying step as in step (iii), and mechanically treating the dried placebo product treated second portion as in step (iv).