Blocking on an open brim / blocking a 2 part hat / using printed sinamay
How to Reblock a Felt Hat - Sempstress
Our Treasures: Chip off the old hat block - NZ Herald
Techniques
Hat Blocking ABC
October 2015 – Hattin' Around & Leanne Fredrick Millinery
blocking Easwas – KDD & Co
How I block my hats — Baroque Purls
How to Block Crochet + Knit a Tutorial - ChristaCoDesign
How to block a hat with a groove?
Vintage Wooden Hat Block Hat Blocking Mold for Making a
Hat Blocks Australia
How to block a hat – Germander Cottage Crafts