I recently aquired a whole bunch of clay containing small fossils, but the clay is extreemly hard and I have trouble to extract the fossil by sieving this with water.
For now I am drying the clay and putting it in sieves and rincing it with watter, but it is extremely labour intensive and uses lots of water and the result is not realy good.
Someone that collects minerals recomended me Sodium hexametaphosphate to help disolving the clay, but I have no experience whatsoever with this product, so like the titel of the post sugests ; Has anyone used sodium hexametaphosphate to disolve clay deposits?
I'am of course also open to other alternatives to extract residu from clay
thx,
Kevin