Koub wrote:It's not random, it came with yesterday's minor update.
viewtopic.php?f=3&t=46452

Awesome haha seemed so random but that explains it all thank you very much for the quick reply.
guess i gotta pay more attention to the update/patch log's

Hello
ive been playing factorio for the last couple of days since i bought it
but ive been encountering a problem while automaticly crafting science packs
it seems that blue and purple science pack recipe requirements keep changing randomly

for example
purple science packs the Production science ...