US 12,029,303 B2
Method for preparation of a cosmetic kit
Takashi Matsuda, Yokohama (JP); Kinya Hosokawa, Yokohama (JP); Chieko Nomizu, Yokohama (JP); Akane Yanagihara, Yokohama (JP); and Yuuichi Nukada, Yokohama (JP)
Assigned to SHISEIDO COMPANY, LTD., Tokyo (JP)
Filed by SHISEIDO COMPANY, LTD., Tokyo (JP)
Filed on Jul. 9, 2023, as Appl. No. 18/219,687.
Application 18/219,687 is a continuation of application No. 16/766,177, abandoned, previously published as PCT/JP2018/043286, filed on Nov. 22, 2018.
Prior Publication US 2023/0354983 A1, Nov. 9, 2023
Int. Cl. A45D 33/02 (2006.01); A61K 8/00 (2006.01); A45D 44/00 (2006.01)
CPC A45D 33/025 (2013.01) [A61K 8/00 (2013.01); A45D 2044/007 (2013.01); A45D 2200/25 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method, for preparation of a cosmetic kit suitable for use in a preparation of a customized cosmetic which is prepared by mixing plurality of cosmetic bases in accordance with a recipe information determined based on user-unique information, wherein:
said cosmetic kit comprise a plurality of cosmetic bases; and
said method comprises the steps of:
(a) rotating, at a predetermined speed, a container containing at least two cosmetic bases selected from said plurality of cosmetic bases;
(b) obtaining, at predetermined time internals, a series of reflected near-infrared integrated absorbance measurements of said at least two selected cosmetic bases in said rotating container;
(c) calculating, for each absorbance measurement, a change ratio Rn between the absorbance in an (n)th measurement (An) and the absorbance in the subsequent (n+1)th measurement (An+1), said ratio Rn being Rn=100 x (An+1)/(An):
(d) determining the elapsed time (T), measured from the initiation of rotation at step (a), at which a calculated value of Rn is between 95% and 105% of the preceding value of Rn;
(e) determining said plurality of cosmetic bases to comprise at least two selected cosmetic bases having said elapsed time T of 35 minutes or less; and
(f) filling each of said plurality of cosmetic bases determined in step (e) into an individual cartridge.