Working one petal at a time, curl the sides of the petals inward using a wooden skewer. Fold the tab along the score lines on each petal.
Organize the pieces by color.
Add hot glue to the top of the tab and press it behind the rounded disc piece. Continue with all the other petals until the center disc is complete.
Repeat this with the other colors and pieces.
Stack the prepared pieces with smallest on the top and largest on the bottom.
Glue them together in the center disc rotating the petals for each layer.
Next, prepare the center pistil piece.
Use the paper scraper to curl the fringed edges outward, thinning and softening the paper gently as you handle the piece.
Starting with the longer fringed end, begin rolling it tightly around a wooden skewer keeping the smooth edge aligned. Remove the skewer.
Release the tightly rolled center creating a loosely wrapped circle.
Add glue to the bottom and press it in to the center of the prepared dahlia.
Crease the leaf pattern along the score lines and glue them to the bottom of the dahlia.