As to the "why" of blocking: here is a "pocket hat" (made of wool) before it is blocked:
Here's the same hat after it is blocked:
I believe these pictures speak for themselves, and hope that you will consider blocking your newly-finished woolen knitwear to get a similar improvement in looks.
As to the how-to, blocking could make a little book in its own right. There are as many methods to block items as there are knitters--inevitably, there are some strong opinions out there on the "right" way. Here's my own little process to get from unblocked to blocked by the full immersion (a.k.a. "wet-block") method. (For steam blocking, click here.)
1. I swish the newly made item in a sinkful of tepid (barely warm) water, using enough water so that the item floats in the sink loosely. No kneading, scrunching, or manhandling: just swishing.
2. Once the item is completely wet, I drain the sink and press the item against the sides and bottom to gently squeeze out as much water as possible.
3. Supporting the item in my hands and against the sink sides and bottom, so that it NEVER sags under its own weight, I squeeze it snakewise--hand-over-hand.
4. Again supporting the item to prevent sagging, I lay it out in a thick and thirsty bath towel. This first lay-out is rather rough, but at the least, I make sure no parts of the garment overlap one another. I roll the item and the towel together, lay the roll on the bathroom or kitchen floor tile and step all over it, barefoot. Doing it in shoes would really dirty the towel, doing this in socks would get my socks wet, doing this on a carpet will make the carpet wet--a LOT of water gets pressed out in this step.
5. Next step is to unroll. Again supporting the item with my hands, I lay it out on a DIFFERENT, dry towel. What happens next depends on the size of the item.
- For small items like hats, mittens, and kid's sweaters, I pat, tug and smooth the item into shape and let it dry. With the "pocket hat" of the intro photos (which was knitted relatively firmly) I actually grabbed it at the brim and at the top and gave several mighty tugs lengthwise before smoothing.
- Larger garments such as sweaters are sometimes tugged, patted and smoothed, or sometimes they are pinned out. Lace and other openwork with edges which have to be "dressed" into points and scallops are also pinned. For pinning, I lay the garment, on its second towel, over a yielding surface--a bed, sofa, fridge box or thick carpet--if a carpet, maybe with a clean sheet spread out to avoid carpet dust and sheddings in the project.
7. Elapsed time? 5-10 minutes (well, except for the drying of course--which takes forEVER). And ... that's it--a beautiful new item, W-A-A-Y more professional looking than the same item in the "before" stage.
I'll end with a couple of FAQs (frequently asked questions).
Q: Do you have to go through all this every single time you wash a woolen hand-knit?
A: Sadly, yes. The good news? It becomes second nature after a few times. Also, if washing a soiled item, you start by swishing through soapy water, then plain water, then all the other steps. For washing (but not for a first blocking) I personally use a drop or two of concentrated hand dish soap (NOT dishwasher machine soap!), then rinse twice.
Q: Blocking or washing makes me nervous. What if I ruin my garment by felting it?
A: Felting requites a combination of wetting AND agitation. You can't avoid wetting wool when you wash it but you CAN avoid agitation. Number one precaution: DO NOT WRING OR KNEAD!! Instead, swish, then squeeze gently but firmly. Also, I attribute a good deal of felting-prevention to step number 4--the barefoot walk all over the jelly-roll of handknit and thick towel. This really removes water effectively and quickly, but does not cause any rubbing or wringing action. Oh--one more thing: temperature shocks encourage felting, so avoid them. Make sure your water is always at a mild, tepid temperature. For this same reason, even if you want to speed along the drying, don't overdo exposure to hot dry air--a dryer, for example would certainly result in felting.
--TECHknitter (You have been reading TECHknitting on "why you should (and how you can) block hand knitting")