The pattern comes from a vintage design, and the thread used is JP. Coats mercerized cotton sewing machine thread. Three strands are held together. The color combinations are endless using thread.
I learned about this technique through Crochet Mastering. It's tedious but worth it.
Some helpful hints I have heard from judges and observations I've made from handwork judging for your handwork
1. Make sure it is clean-wash before entering to remove odors and hair. Judges will notice it.
2. Block your work after washing. I've seen work submitted without blocking and sometimes the shaping is lacking the finishing touch that comes with blocking. I do not use pins, I monitor the piece as it dries, shaping it how it looks best. Usually I check it every couple hours.
3. Make sure all your thread or yarn ends are woven in and/or clipped.
4. If you make a mistake fix it!
5. It's up to the judge, make your project say wow in color and or design, blingy, or other embellishment such as buttons, ribbon, flowers. Presentation is also important for doilies some sort of backboard helps.
6. Some comments can be used towards improvement or correction you've missed-no one is more perfect than God.
Good luck