When you get your fabric, finish the edges and then stitch. No prewashing required. After you finish, you gently launder it by hand. Others will give you more specific information on laundering after you finish the stitching.

I agree with jsimonpurple. You can wash AFTER you've completed your project. I know some people wash their fabric before they start but a lot of stitchers wash after the projects complete UNLESS you accidently get the project really dirt ie. dump coffee on it,
Stitchers will differ on what cleaning product to use after they have completed their stitching project. I'll let them give your their suggestions. I use a very small amount of Ivory Liquid in cool water to wash my project: DO NOT TWIST fabric to get water out whether you're washing or rinsing. I'll even soak my completed project for a couple of days in Ivory Liquid and "swish the project" (no scrubbing) around if I have a particularly dirty difficult spot. The BEST idea is to prevent the project getting dirty in the first place by always washing your hands good right before you start stitching and protect your project from dust and dirt by covering it when you are not working on it.

One of my concerns is the colors bleeding, what about that ?

Unless it's badly folded & you want to check before stitching. Also, check for discoloration. Fabric stored under flourescent light gets damaged in a few months. Also floss.

Fabric & floss is colorfast today, even reds. Stick to Wichelt, Zweigart, or Chas. Craft. DMC & Anchor are safe. Overdyes by Gentle Arts & Weeks now state they're colorfast, and I haven't had problems.

What about hand dyed fabrics. Should they be laundered before stitching? And if so, can they be laundered again after stitching without mishaps.

I had no idea that fluorescent lights damage fabrics and floss. Best to order from ECS then instead of buying merchandise from a shop that has been sitting for who knows how long.

I use Forever New. It's for lingerie and delicate fabrics. I buy it at Dillards. I fill the sink with water and the product, let the project soak for about 20 minutes and rinse it at least 10 times. I continue to rinse even after the water runs clear. At no time do I twist or wring the fabric. I roll it into a bath towel for a few hours and the iron it until dry. I place a towel under it. It doesn't take long before it's dry. If you frame yourself then you might want to let it sit for a couple of days. You don't want mold growing.

Tex, check what each hand-dyer says. No need to prewash. My problem is the holes shrink in the dying process.

But, what about colors of the floss / thread running, that's my MAIN concern, The other Concern is about the fabric FOLDING MARKS, CREASES, they are very deep folds. ? I think they should not fold the fabric, so the creases aren't a problem, I've have had some fabric / cloths rolled.

Oh boy, thanks, jl. That's all I need - small holes! I only have one piece, can't remember the business I ordered it from but the name came up here repeatedly. It's beautiful and I want to use it.

DH loves the Firestick, I put series on for him, so I have a little more time to stitch.

I also love modern appliances. Dryer, washer and dishwasher are running while I am on the computer.

LOL

I usually only stitch on Aida fabric and I wash each piece before I start stitching so it is easier to handle. I wash it in my washing machine on gentle cycle with liquid soap and fabric softener. I then hang it on a plastic pants hanger to air dry before I lightly steam press it. I then stitch a small hem on it if it is going to be a very large project. For smaller projects I just use masking tape. This has worked for me for over 30 years of stitching. When I am done I repeat the process before I do my own framing.

Your best bet is to do whatever works for you.