Inks for 3D printing

A composite ink for use in a three-dimensional printing system comprising:

• a carrier ink comprising a curable material;
• and
• a colorant dispersed in the carrier ink in an amount of 0.01 to 5 weight %, based on the total weight of the composite ink,
• wherein a chroma of the composite ink at a given thickness of the composite ink is within 20% of a maximum chroma of the colorant in the composite ink, and
• wherein the carrier ink has an optical transparency of at least 80% transmission between 350 nm and 750 nm at a thickness of 0.01 to 10 mm;
• wherein the curable material consists of 15-25 wt. % urethane (meth)acrylate oligomers;
• 28-42 wt. % non-oligomeric mono(meth)acrylates, 28-36 wt. % non-oligomeric di(meth)acrylates, and 8-12 wt. % non-oligomeric tri(meth)acrylates wherein the carrier ink comprises 0.1-0.2 wt. % stabilizer and 2-4 wt. % photoinitiator.