Our showroom is open and we are dispatching orders as usual!
The Shapton Glass Stones come as standard as the HR range, using White Alundum. For the Japanese market they also produce the HR range, only as grits #4000, #6000 and #8000. These three stones are light grey rather than the regular white, and use Grey Alundum - they are only produced in these three grits only as they are considered the essential stones for fine finishing work on Japanese laminated blades - kitchen knives, planes and chisels, for example - and the bind is sofet, giving a slightly softer overall feel that doesn't scratch the softer cladding so much. There is very littel actual sharpening difference between the two grades.