A quote from another post.
"Hi Alan
That is two different types of MB-115!
Which is why going forward (but not happened quite yet) they will be differentiated by the addition of the suffix SB to the superior supply. Hopefully this will enable clients to make an informed choice about their resin supply - the superior supply may cost a pound or so more, but it will be guaranteed to perform to the usual high Tulsion standard.
Currently there are two wholesale importers bringing Tulsion products into the UK. The product specification differs between the products imported by the wholesaler that we use and the wholesaler that most others use. The wholesale importer that we source through has a quality-checked and assured strong base resin based on a tight manufacturing and testing specification whereas the other wholesale importer supplies resin without a set specification meaning the quality cannot be guaranteed.
Each year we see a few posts popping up on forums stating that the quality of MB-115 is of not of a high standard. When the wholesale importer has checked on the supply of 'this' resin they find that it has not come from the batches they import and are always from the batches imported by the other wholesale importer which are of a lesser specification.
Hope that has clarified this
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