Painting on glass: Vitrea 160 and Vitrail : the Q&A Vitrea 160

Vitrea 160 : Can the decorated objects be put in contact with food?
No, only surfaces not intended to be put in contact with food must be decorated.

Vitrea 160: How to prepare the surface to be painted?
Very simply, just degrease the surface to be decorated with alcohol or soapy water.

Vitrea 160: When applying, frosted colours have a shiny appearance, is this normal?
Yes, these colours only show their frosted appearance once dry. Always make sure to stir the colours in the bottles and shake well the markers before applying.

Vitrea 160: How to correct a mistake?
Before firing, the Vitrea 160 colours are removable with water or alcohol: Use a cotton swab to correct a detail or soak your object for a few minutes to remove everything.

Vitrea 160: Can I apply layers?
Yes, there are two ways to proceed. Apply the second layer directly, without waiting until the first is dry. You can also apply the first layer, cook it, then apply the second coat.

Vitrea 160: On what surfaces can you paint with Vitrea 160?
This product is particularly well suited for painting on glass or crystal. Nevertheless you can obtain interesting effects with other types of surfaces that can withstand a temperature of 160°C.

Vitrea 160: At first use, how to get the colour in the tip of the marker?
Stir thoroughly, then count 30-60 seconds while regularly pressing the tip to start the marker.

Vitrea 160: How to lighten a colour?
By mixing either the shiny or matte medium with the colours you want to lighten.

Vitrea 160: How to thin colours?
Thin the Vitrea 160 colours with the Vitrea 160 thinner to obtain the desired consistency. Do not use water which would weaken the resistance properties of the colours.

Vitrea 160: Can the mediums be used on their onw?
Yes. The gloss medium, almost invisible when cooked, is ideal for producing inclusions.
The frosted medium allows achieving remarkably similar effects to etched glass.

Vitrea 160: Why did the colours bubble when cooked?
You probably did not let dry long enough before baking. The chosen surface was perhaps too porous.

Vitrea 160: Why is it that the colours were altered in the dishwasher?
Several possible reasons: the surface wasn’t degreased properly; the colours were diluted with water or the temperature settings and cooking time were not met.

Vitrea 160 : Should the object immediately be placed in the oven once it is well heated?
No, it is even advisable to insert the object in the oven when it is still cold, to avoid thermal shock. Conversely, once finished baking, allow the oven to cool before removing the object.

Can the glass withstand a temperature of 160 °C?
Place the piece in a cold oven, when the oven temperature reaches 160 °C (325 °F), cook it for 40 minutes, then allow the piece to cool in the oven. This limits any thermal shocks that could cause the glass to break.

Is it possible to reduce the 24-hour drying time before cooking?
It is important to let the paint dry for 24 hours before cooking. If the paint film is not totally dry, the water contained in the film will boil on cooking and create defects such as bubbles or blisters on the surface.

Can V160 colours be used with an airbrush?
Vitrea 160 paints can be used with an airbrush. To do so, thin the colours with Vitrea 160 thinner (ref 113050) until you achieve the desired consistency. Do not use water; it will reduce the resistance of the colours to washing.

I mixed P150 and V160 on the same piece; at what temperature should I bake it?
If you have mixed the 2 products P150 and V160 on the same piece, fire it at the highest temperature and the longest time (i.e. 160 °C for 40 min), for optimal properties.

What is the consumption of a 20 ml tube of Relief?

A line of 15 meters.

What is the consumption of a V160 marker?

150 metre line.

Why did the colours bubble when cooked?
You probably did not let dry long enough before baking. The chosen surface was perhaps too porous.