In 1653 at the start of the Royal Delft Porcelain Bottle yellow-baking clay was used which after having been baked was first covered with tin-glaze and then were painted with crushed oxides. During the second baking in the oven came the color. A century later they moved on to white-baking clay like the English example of Wedgwood. For the manufactoring of Delft pottery the clay ingredients are carefully selected. The clay consists of approximately 10 different raw materials of wich the most important are: kaolin, chalk, feldspar and quartz. This white clay gives the opportunity to paint directly after the first baking and only then immerse them in glaze and for the second time to bake. It gives a sharper drawing. The photo shows the right vase is fully hand painted with cobalt and that still looks black-gray. After the glaze is applied in unfired state it is opaque as you can see on the left vase. Now the product goes into the oven for the second time. During the firing process the glaze melts at a temperature of 1200°C into a transparent layer of glass. The decoration resurfaces at that stage. The chemical and physical reaction between clay, engobe, paint and glaze at that temperature is what creates the typical Delft Blue color, like the cup in the middle of the picture. A surprisingly beautiful process.  

You can recognize the original Delft decorative pottery by its logo that is ingrained on each article. A pharmacy bottle including the intertwined initials JT of Joost Thooft the owner of the company in 1876 and the word Delft written in this manner. Left of the mark you see the initials of the painter and to the right two letters indicate the code years. That mark is the guarantee of genuine, entirely hand painted Delft earthenware of “Royal Delft – Koninklijke Porceleyne Fles” Netherlands, according to the accompanying statement from the Chamber of Commerce.

Delft Blue Earthenware: The world famous Delftware inspired by Chinese motives has for centuries been completely hand painted. Refined flower, leaf and vines motifs interspersed with ornamental birds or typical Dutch landscapes and seascapes are still the subjects of the painting of the pottery of the “Royal Delft” as it was in the 17th century. Under Shop you find this blue and most famous collection.

Delft Polychrome Earthenware: Polychrome is the name for the Royal Delft pottery of the Porcelain Bottle whose primary colors are formed by blue, yellow, green and red. The origin of these Majolika colors were already in use in the 17th century. The knowledge about the application of these colors came from the countries surrounding the Mediterranean Sea. Under Shop you can find this colorful collection

Delft Black Earthenware: Black Delft also known as “the wondrous black of Delft’ was a type of pottery at the end of the 17th century wich could only be produced by just a few higly skilled Delft potteries. “The Royal Porcelain Bottle” brought this collection again in 1978 to mark the 325 anniversary of the company. Vibrant Delft colors on a laquer black background. A beautyful product with refined oriental expression. Delft Black isn’t in production anymore today. Under Delft Shop/Plates, Vases and Others, you will find some products of this collection also called “Famille Noir”.

Delft Pynacker Earthenware: Pynacker is the name of the Delft earthenware mainly painted with the colors red, blue and gold. Originally traced back to the Japanese Imari porcelain which was brought to the Netherlands by the ships of the VOC in the 17th century, the painters of “The Royal Porcelain Bottle” developed it into products with its own unique, individual beauty. Pynacker pottery goes into the oven three times. The first time the mould is baked out of clay. The second time it is baked after the painting with the colors red and blue with applicated glaze and finally it is baked for the third time after the gold has been applied, this because the 24-carat gold it is not resistant at high baking temperatures. Delft Pynacker isn’t in production anymore today. You can find a single product under Shop/Vases.