Cornelissen : Professional Glass Muller : 8cm (Apx.3in) : For Mixing and Grinding Pigment - Cornelissen : Sundries - Cornelissen - Brands | Jackson's Art Supplies
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Glass Muller for Making Paint, 7.5 cm Flat Bottom Mineral Pigment Grinding Pestle, Glass Grinding Apparatus for Watercolor Oil Painting Thangka Tempera Making Paint Homemade : Amazon.co.uk: Home & Kitchen
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