I have spent today sorting through several boxes of rubber base printing ink. Seeing which are still viable & which are rock hard! There are so many tins of 'chocolate' I wonder what was being printed? Lots of different reds and greens but only one white and one yellow. Its mucky work though, many of the tin lids are stuck tight and all are dusty and dirty. Many had a pantone number which seemed to agree with my swatch book & made me realise what a truly clever system it is. Once sorted I shall keep some for myself and pass the other onward to suitable places with the generosity of spirit in which I received them. I think my hands will ache tomorrow. Thanks Andy English, I'm beginning to see why you use mostly black...so much easier to find the colour you want!