Colour Reference Solution BY (brownish yellow) for testing the colour intensity acc. to Ph. Eur. BY1-BY7 Reag. Ph. Eur.

Colour Reference Solution GY (greenish yellow) for testing the colour intensity acc. to Ph. Eur. GY1-GY7 Reag. Ph. Eur.

Colour Reference Solution R (red) for testing the colour intensity acc. to Ph. Eur. R1-R7 Reag. Ph. Eur.

Colour Reference Solution R (red) for testing the colour intensity acc. to Ph. Eur. R1-R7 Reag. Ph. Eur.

Colour Reference Solution Y (yellow) for testing the colour intensity acc. to Ph. Eur. Y1-Y7 Reag. Ph. Eur.