Should the Lachat Universal Dye be used directly or should it be diluted before use?
Universal dye for Lachat timing
The Lachat Universal Dye 250 mL (Product # 50959) should not be used directly. It should be diluted before use and the exact dilution is not critical, bit a 1:10 dilution should be sufficient. If the dye is used directly, it increases the likelihood that a clog will form.