Your search "d.i.y. redscale slide positive film bandung indonesia hervinsyah" resulted in 1 Article
It's okay to don't think just shoot, but what's better is to think, budget, AND shoot. So maximize your slide film when you want to by D.I.Y. redscaling it with only using 3 or 5 of the last frames of the roll, cause the rest of it is very precious.