Yesterday I got myself myself my first Hanna checker and the result was a lot higher than my colour chart readings.
I done 3 colour readings with API that all came out at 8.3 but my Hanna checker was 9.1!
Is it more likely that I consistently use the API kit incorrectly rather than the Hanna?
I done 3 colour readings with API that all came out at 8.3 but my Hanna checker was 9.1!
Is it more likely that I consistently use the API kit incorrectly rather than the Hanna?