4 Jewelry Techniques in 4 Days: Granulation, Keum Boo, Reticulation, Patina with Umut Demirgüç Thurman

4 Jewelry Techniques in 4 Days: Granulation, Keum Boo, Reticulation, Patina with Umut Demirgüç Thurman

Workshop Date: May 24-25-26-27, 2018


Workshop Leader: Umut Demirgüç Thurman

Workshop  Plan:

1st Day:  Granulation is an ancient technique used in jewelry. Students will make their own gold or silver granules and apply them to a piece of jewelry they design.

2nd Day:  Keum Boo is an ancient Korean art of gilding using heat and a burnisher to fuse very thin 23.5 carat gold sheet to silver designs.

3rd Day:  Reticulation is a technique used to give texture to the surface of the metals such as silver or brass.

4th Day:  Patina is used to create striking, high-contrast effects on jewelry designs. Students will use chemical patinas and paints for the silver surfaces.

The Materials Students Should Bring:



10 x10 cm 0.8mm Sterling silver sheet


Keum Boo Gold: 0.003mm thickness, usually sold as 7x7cm, 23.5 carat (Can be bought from the instructor for 100 USD)


0,8 mm silver wire


A box to hold granules



***Important note: This is an intermediate level class, it is imperative to know basic jewelry making techniques to take this workshop.



Umut Demirgüç Thurman

There are many different influences in my work.  The materials I choose are a major inspiration for me.  I use precious metals, enamels, and Thurmanite® (a composite material made of layers of paper bonded together with eco-resin, created by James Thurman).  The other source of influence is my culture and heritage.  I was born and raised in Istanbul, Turkey, which is considered Old World.  It is possible to see the remains of many different cultures and civilizations in Istanbul.  I chose to use Ottoman Empire textile motifs in my work because of my background in Textile and Fashion Design.  The motifs that I most often use in my artwork are derived from natural plant forms through stylized drawing of the bird’s eye view of a flower.  I believe, when plainness and symmetry of the motif combines with textured and colored metal, it creates objects that connect history to modern day. My other influence is pocket watches and little containers.  I chose to make lockets because they allow me to combine simple geometrical shapes and pierced traditional motifs.  Lockets have been a favorite kind of jewelry for all times.  People use them as containers for their loved ones’ pictures and carry them on their body.  Most people believe that lockets are secret keepers.  Similarly, my lockets keep my cultural history and my personality as their secrets.  I use the pierced motif in different ways; either on the surface of the lid or inside the locket.  In my work, visual aspects are as important as the concept.  For this reason, besides being conceptually strong, I make my lockets well crafted.  In this way, I hope to invoke the viewers’ sense of surprise and curiosity in terms of the design and the technique.Education:MFA in Metalsmithing and Jewelry - University of North Texas, USABFA in Textile and Fashion Design - Mimar Sinan Fine Arts University, Istanbul, Turkey​


The Glass Furnace was first designed as a glass studio but has quickly become one of the world’s leading glass schools and this is the outcome of a long and intensive work. Since the day it was founded, The Glass Furnce has been hosting world renowned artists, teaching various glass techniques to Turkish students and students from all over the world, through different duration workshops.

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