Alternative Aigame-s (and semantics)

This is the 40 liter (10.5 gal) indigo vat. The one in the first post  holds 270 liters (71 gal). Besides the size you may have noticed a few other differences.
I hesitate, in a way, to call a 40 liter plastic pail an 'aigame' but I do anyway.
The plastic bucket is more common these days but whatever sort of container, it can be called 'aigame' if it is used for indigo. Since Indigo needs to be either fermented or reduced chemically, to produce that dark blue, buckets full of indigo are usually called 'vats' in English.
Our mini 40 liter aigame is a natural fermentation vat which was started 2 weeks ago. It is wrapped in an electric blanket, insulated and then covered with an old drop cloth, giving it a kind of trendy grunge look. The temperature must be maintained at around 27C or else the bacteria will become sluggish and hibernate. The ph level must be very alkaline in order to dissolve the indican pigment, making it useable as a dye.