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All of our underglaze colors are lead-free, A/P non-toxic and dinnerware safe when covered with a dinnerware safe clear glaze. We offer a full palette of rich, vibrant colors that are opaque with 3 coats, semi-opaque with 2 coats and semi-transparent with 1 coat. They are compatible for use under most clear glazes. Unlike many other brands of underglaze we use a frit base rather than a slip (clay) base for our underglazes. The advantages to the user are that our underglazes can be applied on greenware or bisque and they can be used with or without a clear glaze covering. When used without a clear glaze cover they have a matte velvet like surface. However, when used without a clear glaze cover they are not considered dinnerware safe because the rough surface can be difficult to clean and can encourage bacteria growth. Our color chart shows the unglazed color in the right (lower) half of the tile and the color when covered by a clear gloss glaze in the left (raised) half of the tile. The color chart samples were fired at cone 05. Our underglazes generally have good temperature stability up to cone 6 and for many colors to cone 10. When fired hotter than cone 04 you may get small color variations from those shown on our charts, so please test them for your application. Some of our underglaze colors will start to look glossy without any clear glaze cover at cone 5. These softer colors are 507, 530, 537, 544, 552, 560, 567 and 568. Our underglazes can be intermixed to create your own colors. However, we recommend not mixing 561, 562, 563, 567, 568, 569 with any of the other colors. These colors are based on cadmium encapsulated stains that do not mix well with other ceramic stain colors.

Products 1-48 of 58
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WHITE
Availability: In Stock
Spectrum Item #: SPEC-501 -

    YELLOW
    Availability: In Stock
    Spectrum Item #: SPEC-504 -

      ORANGE
      Availability: In Stock
      Spectrum Item #: SPEC-505 -

        BRIGHT YELLOW
        Availability: In Stock
        Spectrum Item #: SPEC-506 -

          ENGLISH ROSE
          Availability: In Stock
          Spectrum Item #: SPEC-507 -

            BABY PINK
            Availability: In Stock
            Spectrum Item #: SPEC-508 -

              BLUSH
              Availability: In Stock
              Spectrum Item #: SPEC-509 -

                AZTEC BROWN
                Availability: In Stock
                Spectrum Item #: SPEC-511 -

                  WALNUT BROWN
                  Availability: In Stock
                  Spectrum Item #: SPEC-512 -

                    CHOCOLATE
                    Availability: In Stock
                    Spectrum Item #: SPEC-513 -

                      BLACK
                      Availability: In Stock
                      Spectrum Item #: SPEC-515 -

                        CHARCOAL
                        Availability: In Stock
                        Spectrum Item #: SPEC-516 -

                          LIGHT GRAY
                          Availability: In Stock
                          Spectrum Item #: SPEC-517 -

                            SAND
                            Availability: In Stock
                            Spectrum Item #: SPEC-521 -

                              TEA
                              Availability: In Stock
                              Spectrum Item #: SPEC-522 -

                                HONEY
                                Availability: In Stock
                                Spectrum Item #: SPEC-523 -

                                  MUSTARD
                                  Availability: In Stock
                                  Spectrum Item #: SPEC-524 -

                                    LIME GREEN
                                    Availability: In Stock
                                    Spectrum Item #: SPEC-525 -

                                      MID GREEN
                                      Availability: In Stock
                                      Spectrum Item #: SPEC-526 -

                                        CHARTREUSE
                                        Availability: In Stock
                                        Spectrum Item #: SPEC-528 -

                                          DARK OLIVE
                                          Availability: In Stock
                                          Spectrum Item #: SPEC-529 -

                                            HUNTER GREEN
                                            Availability: In Stock
                                            Spectrum Item #: SPEC-530 -

                                              PRUSSIAN BLUE
                                              Availability: In Stock
                                              Spectrum Item #: SPEC-531 -

                                                SKY BLUE
                                                Availability: In Stock
                                                Spectrum Item #: SPEC-532 -

                                                  TURQUOISE
                                                  Availability: In Stock
                                                  Spectrum Item #: SPEC-533 -

                                                    LAVENDER
                                                    Availability: In Stock
                                                    Spectrum Item #: SPEC-534 -

                                                      BLUE GRAY
                                                      Availability: In Stock
                                                      Spectrum Item #: SPEC-535 -

                                                        BRIGHT BLUE
                                                        Availability: In Stock
                                                        Spectrum Item #: SPEC-536 -

                                                          COBALT BLUE
                                                          Availability: In Stock
                                                          Spectrum Item #: SPEC-537 -

                                                            DENIM BLUE
                                                            Availability: In Stock
                                                            Spectrum Item #: SPEC-540 -

                                                              PURPLE
                                                              Availability: In Stock
                                                              Spectrum Item #: SPEC-541 -

                                                                BURGUNDY
                                                                Availability: In Stock
                                                                Spectrum Item #: SPEC-544 -

                                                                  RUBY
                                                                  Availability: In Stock
                                                                  Spectrum Item #: SPEC-545 -

                                                                    NECTARINE
                                                                    Availability: In Stock
                                                                    Spectrum Item #: SPEC-547 -

                                                                      RUST RED
                                                                      Availability: In Stock
                                                                      Spectrum Item #: SPEC-548 -

                                                                        TERRA COTTA
                                                                        Availability: In Stock
                                                                        Spectrum Item #: SPEC-549 -

                                                                          MEDIUM PINK
                                                                          Availability: In Stock
                                                                          Spectrum Item #: SPEC-551 -

                                                                            LILAC
                                                                            Availability: In Stock
                                                                            Spectrum Item #: SPEC-553 -

                                                                              ROYAL PURPLE
                                                                              Availability: In Stock
                                                                              Spectrum Item #: SPEC-554 -

                                                                                LIGHT GREEN
                                                                                Availability: In Stock
                                                                                Spectrum Item #: SPEC-556 -

                                                                                  LEAF GREEN
                                                                                  Availability: In Stock
                                                                                  Spectrum Item #: SPEC-557 -

                                                                                    JADE
                                                                                    Availability: In Stock
                                                                                    Spectrum Item #: SPEC-558 -

                                                                                      BLUE GREEN
                                                                                      Availability: In Stock
                                                                                      Spectrum Item #: SPEC-559 -

                                                                                        TEAL BLUE
                                                                                        Availability: In Stock
                                                                                        Spectrum Item #: SPEC-560 -

                                                                                          DARK RED
                                                                                          Availability: In Stock
                                                                                          Spectrum Item #: SPEC-561 -

                                                                                            BRIGHT RED
                                                                                            Availability: In Stock
                                                                                            Spectrum Item #: SPEC-562 -

                                                                                              BRIGHT ORANGE
                                                                                              Availability: In Stock
                                                                                              Spectrum Item #: SPEC-563 -

                                                                                                BRIGHT GREEN
                                                                                                Availability: In Stock
                                                                                                Spectrum Item #: SPEC-564 -