We've been hand dyeing all of our own hemp (blend) fabrics since 2003. It started with our first 100 yards of muslin. We had a hard time finding hemp fabrics in anything but it's natural raw form, so we started hand dyeing to have more than the 5 color choices the factory dyed fabrics came in. Today I think they are up to 10 factory dyed colors, but we've broken out of those limitations and have grown our hand dyeing to over 200 color choices and patterns, in almost a dozen different hemp blend fabrics including our *new* muslin with organic cotton, jersey, hempcel, silk, and recycled polyester.
We have two different dyeing techniques we use. Vat or tub dyeing (check out our dye suppliers instructions: www.dharmatrading.com/...) where we use trash cans and our 86" sink and hoses. This technique (along with lots of time and muscles) produces our even solid dyed fabrics. We also use a low water immersion technique in small containers for our marinades to give a marbled effect or pattern. This technique uses less water and salt, making it that much healthier for the environment in less consumption.
We are now line drying all or our fabric, as our 'just one (more) thing' to help the environment in the business (and personal) practices we are committed to. 
All of our fabrics and clothing are machine wash and dry able, but we encourage you to think about energy consumption and try to do 'just one thing' to cut down... if not the dryer maybe something else?
