Marbling is one of the easiest print-making techniques that can also be a 'hit or miss' for beginners. Done well and inks will spread and interact to create some truly amazing forms, lines and colours. Miss a step and your inks will sink and you'll get absolutely nada after a day of preparation (marbling mix and paper/fabric need to be prepared beforehand).
Black & White is closest to heart for me, both in purity of lines and depth of expression. But I've since dabbled with colours to do some justice to marbling's ability to produce some truly amazing, and always surprising colour stories.
My best marbling works to date were those which I had the least control over.
The colour prints were marbled using marbling material and JACQUARD inks available from: https://www.dharmatrading.com/ The marbling base (thick viscous solution on which to float your inks) I use is made with Carrageenan powder.