The MAC 131 Brush ($40.00, limited edition and available with To the Beach) was originally released with Colour Craft (July ’09), and I’ve owned it since and used it once. I spent the past couple of weeks testing it out for the first time and seeing what it works best for. MAC describes it as, “Flat, tapered brush that contains a combination of short and long fibres … [i]deally suited for Mineralize Skinfinish Powders.”
FOUNDATION: When it comes to liquid foundation, it does the job. I liked the application and finish better than the 187, because it seemed a lot less streaky (which is why I moved past the 187 to the 182 and now use the 109). The application with the 131 is quite a bit different, given that it’s a flatter, slightly tapered and angled brush–you don’t blend in a circular motion here. It’s more about soft sweeps and pulls to get the product blended on your face.
CREAM BLUSH: I prefer the 130 (also available with To the Beach but appears to be permanent) or the 188 (permanent) over the 131. The 131 is nice for blending out the color initially, but I find that being able to buff small circles is one thing I really find preferable in technique that the 131 doesn’t make so easy. You can see me demonstrate how to apply cream blush using a stippling brush like the 131 in this video (along with the 130). It is better with more emollient/thinner cream blushes than thicker consistencies.
MINERALIZE BLUSH/SKINFINISH: Like the 187, using the 131 to apply mineralize color products like the blushes, blush duos, and skinfinishes helps to soften the color and diffuse some of the glittery particles. It gives a very soft, subtle color and deposits a light layer of the sparkler/shimmer. I think it’s nice on some of the more pigmented, dirtier, or glitter-heavy shades, particularly for those with more visible pores. I think if you have the 187 or 188, you may not find the 131’s application far superior. I like the 131 a bit more, but it’s a close race. It’s also smaller than the 187, so it may be more manageable on cheeks in comparison.