A rosin press compresses dry marijuana into solventless extract.

Furthermore, a solventless extract does not contain solvents or chemicals. A rosin press creates a solvent-less cannabis extract, or wax, when heated.

See also our following resources on rosin:

• Make Your Own Rosin Press For Less Than $100
• How to Winterize Rosin: A Complete Guide
• Rosin Basics: What is Rosin and How To Make The Solventless Extract

An industrial-grade rosin press can extract up to 30% yield from flower. You own table-top hair straightener methods might only yield 5%. New rosin press technology is being researched and explored all the time, because the high end rigs currently range into the thousands of dollars.