gazfocus;150117 wrote: (I suspect they are looking to see if the issue is ourselves or the mugs haha).
Don't assume that suppliers are always telling the truth.
We used to produce repeat signage (not sublimation) for a good customer using a premium quality material.
One day after some years of no problems we had almost finished an order but had to load a new roll which had just arrived. Exactly the same material, product ref. etc. The new roll instantly misprinted and when we telephoned the supplier they swore we were the only one to have problems, made us email photos, run all sorts of tests, etc. We needed an urgent solution and were confident the problem was not our machinery or settings but eventually agreed to have another roll if they quality checked it first. Next day the new roll arrived with "Quality Checked" scrawled on the box but no sign of a test. It was just as bad as the first and to add insult to injury we were billed for it too with no credit on the first one...
A few months later I was called by a friendly office bod from that supplier who I had known years before. He noted that I wasn't buying from them any more and I told him why.
"Oh that stuff" he said, " We've had nothing but problems with it. Everyone is complaining"
In the meantime we had changed to a different supplier whose USP was that they had their own British factory and all of their products were 100% British. It was therefore surprising that one day they had no stock of this particular material. When I enquired when they might have it a newish employee said "No idea, it's stuck on a ship somewhere between here and China!"
There's another similar story I won't bore you with but suffice to say I never trust what a supplier says now.