Bought this glasscast 3 for a project about 8 months ago and worked very well.
Mixed up a litre today by weight 100/50 as per instructions for 10 minutes. Steam started coming off and went totally solid a couple of minutes later....... really not happy !!!!!

80x26x0,3cm=0,62L. And 3mm is the Upper end. But that is not my point. You simply can not let epoxy stand around (or mix) in a compact 1L container. The reaction will build up heat, which accelerates the reaction, wich accelerates the heat production and so on. This can only be done with extra low reactivity resins like gc50.

I see and I get what you’re saying however I followed the instructions correctly.
There should be limitations written on the instructions as to what not to do then if this is the case.
As far as I’m concerned, I followed the mixing instructions correctly but I appreciate what you’re saying so thank you 👍