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Lightfastness test.
| Sample types | Lightfastness rating |
|---|---|
| Complex acid & cationic softener | 3–4 |
| Citric acid & cationic softener | 3–4 |
| Acetic acid & cationic softener | 3–4 |
| Complex acid & nonionic softener | 3–4 |
| Citric acid & nonionic softener | 3–4 |
| Acetic acid & nonionic softener | 3–4 |
