【Skill 4】Understand that additives such as synthetic dyes and preservatives are not used
Put these skills together to understand that additives such as synthetic dyes and preservatives are not used.
[Skill 1] Understand that additives are not used from the expressions such as フリー (free) and 無添加 (no added)
[Skill 2] Understand that alcohol and preservatives are not used from the expressions such as アルコールフリー (alcohol free) and 防腐剤無添加 (no added preservatives)
[Skill 3] Understand that fragrances and dyes are not used from the expressions such as 香料ゼロ (zero fragrances) and 無着色 (no dyes)