I am trying to use the black resin crack filling technique for filling my

I need to know which products to order to do this:
- resin, needs to have very low viscosity in order to be able to enter and settle into these cracks, also a very low shrinkage factor. 
- dye / pigment to use - as black as possible
- quantity somewhere between 0.8-1.5kg is what I expect to need
- slow curing, I have lots of cracks to fill and I don't want to miss them, minimum 30min, preferable 1h if possible
- wood planks are up to 5cm deep, in case it matters.
- price wise, i don't want to spend too much. initially I found the West System advertised on YouTube but apparently is quite expensilbe. 

I have a similar question.  I have an old wooden table made from a roundel of yew which has a crack in it which is 7cm deep by 25cm long and an average of 1cm in width.  Which resin would be best and how much do I need?