Color Irregularities

There are color irregularities of applying a glaze or slip, which are different from part to part in a piece of ware. For example, some parts are glazed thinly or thickly depending on the shape of the ware. That leads to part-to-part subtle differences in appearance of the clay in a piece of ware.

Glaze or Slip Drips

The glaze or slip may look like dripping. There is unevenness of a glaze or slip when they are applied to ware by hand. There also appear glaze drips or slip drips, which are caused by the glaze or slip flows during firing.

Pinholes

Pinholes may be seen clearly on the surface. Pottery (earthenware) is mainly made from earth, and green ware contains a lot of air while biscuit firing. While glazed firing, this air inside the biscuit ware becomes air bubbles, which remain and look like small holes on the surface of the glazed part. Those small holes are called pinholes.

Crazing (Chaps)

Crazing (having chaps) may appear clearly on the glazed part. The “direct” crazing means having chaps originally. The “aging” crazing means having chaps over time as you use the tableware item. There is a difference between the shrinkage rate of the glaze and that of the clay, so crazing occurs. Note that those cracks do not come from the damage of tableware items. They might appear just before use, but it is no problem in terms of use. They appear on the surface of pottery (earthenware) and semi-porcelain.

Microwave Safe

A microwave oven heats or cooks food very quickly using short electromagnetic waves, namely, microwaves. In most cases, the microwaves heat the water content of the food. However, in some cases, the microwaves concentrate on the carbonized (burnt) parts of the food, causing the temperature to rise higher than the other parts. For example, the microwaves concentrated on the carbonized (burnt) parts of stir-fried vegetables can create a large temperature difference in /on the tableware item, which may cause breakage. In addition to water content, oil content is also heated. The oil has a higher boiling point than the water, so it heats up at a higher temperature, creating a very large temperature difference between the parts that contain oil and the parts that do not, which can cause breakage.

・Never soak hot tableware in water or place it on the cold kitchen counter. Avoid rapidly heating frozen foods or putting [the cold tableware just taken out of the refrigerator] in the microwave. A rapid change in temperature will lead to “crazing” (chaps) or breakage.

※The products with gold or silver paintings, or applied with particular glazes are not microwave safe. We put a “Do Not Microwave” sticker on those items, so please confirm it.

※Accessories etc., made of other materials are excluded from microwave safe items.

Open Fire Safe

The material of this product is heat-resistant ceramic. It can be used over an open flame; it cannot be used in an induction cooker.

This product is made of heat-resistant ceramic.

○ Some of the surface may have cracks (penetrations) at the time of purchase, and others may become penetrated as they are used.

○ The clay particles are coarse and moisture from the food placed in the vessel may seep out.

○ Insufficient drying can cause the following.

・ When put on fire, the moisture absorbed by the vessel may seep out from the sides and burn

・ If stored with moisture remaining in the vessel, stains and mold can easily form