30 MINUTEN SCHWESTERN Wasserschiebeaufkleber für allgemeine Zwecke 1

This is the first 'General Purpose' decal sheet out of three (currently) for 30 Minutes Sisters.
It features eyes for Rishetta, Tiasha and Luluce, plus three alternative color variants which kind-of-sort-of fit Alka-Carti and Far-Farina, while the Luluce alternative is an odd greyscale version that I'm not quite sure of.

Quality-wise, these are not the tampo-print, which is a process that uses anywhere from one to a dozen layered color stamps (typically one for each color applied), so each pre-printed face you see in mecha musume style kits actually goes through quite the process.
Instead you have fine printed halftone dot patterns (think magazine images viewed up close) that simulate shades and gradients. They're subtle, but when I can pick them out as a nearsighted middle aged man, a camera definitely can, so macro-shots and extreme close ups will definitely reveal the difference.

There are only a handful of open mouths, since a lot of the various blank faces you get already have a tiny mouth sculpted onto them.

You also get a variety of effect decals and symbols to add a bit of character to the faces/model, such as blush marks, sweat drops, popping veins and a variety of bandaids/pflasters.

Conclusion:
This is an old sheet and the second one isn't much better, they both mostly just offer a lot of eye placements/sight directions and not a lot of expressions. The third sheet has a lot more expression variety but is very hard to get a hold of.

There will be a new thin-film sticker sheet coming out February 2027 (in Japan) based on Rishetta-Freesia, Tiasha-Dahlia and Luluce-Lily with much more expressive eyes and shapes, as well as guides to help place them.

If you want full expressive faces, I recommend the 30MP Bocchi kits, which each come with a sheet of over 20 faces. They have more of an anime/manga look to them, which makes them more ubiquitous and useful for any kit to use.
They certainly come at a premium cost, but at least you get a kit and a sweet instrument with each one!

Don't forget softener and a flat top coat.

This is the first 'General Purpose' decal sheet out of three (currently) for 30 Minutes Sisters.
It features eyes for Rishetta, Tiasha and Luluce, plus three alternative color variants which kind-of-sort-of fit Alka-Carti and Far-Farina, while the Luluce alternative is an odd greyscale version that I'm not quite sure of.

Quality-wise, these are not the tampo-print, which is a process that uses anywhere from one to a dozen layered color stamps (typically one for each color applied), so each pre-printed face you see in mecha musume style kits actually goes through quite the process.
Instead you have fine printed halftone dot patterns (think magazine images viewed up close) that simulate shades and gradients. They're subtle, but when I can pick them out as a nearsighted middle aged man, a camera definitely can, so macro-shots and extreme close ups will definitely reveal the difference.

There are only a handful of open mouths, since a lot of the various blank faces you get already have a tiny mouth sculpted onto them.

You also get a variety of effect decals and symbols to add a bit of character to the faces/model, such as blush marks, sweat drops, popping veins and a variety of bandaids/pflasters.

Conclusion:
This is an old sheet and the second one isn't much better, they both mostly just offer a lot of eye placements/sight directions and not a lot of expressions. The third sheet has a lot more expression variety but is very hard to get a hold of.

There will be a new thin-film sticker sheet coming out February 2027 (in Japan) based on Rishetta-Freesia, Tiasha-Dahlia and Luluce-Lily with much more expressive eyes and shapes, as well as guides to help place them.

If you want full expressive faces, I recommend the 30MP Bocchi kits, which each come with a sheet of over 20 faces. They have more of an anime/manga look to them, which makes them more ubiquitous and useful for any kit to use.
They certainly come at a premium cost, but at least you get a kit and a sweet instrument with each one!

Don't forget softener and a flat top coat.