Information, Inspiration and Insights
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Information, Inspiration and Insights

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Information, Inspiration and Insights

Oil Based Adhesives

Oil based gilding adhesives may be used for both interior and exterior gilding projects.
The French LeFranc size has superior leveling properties and most predictable characteristics. Rolco size produces excellent results, dries hard and may be sealed after curing for 24 hours.

Oil sizes are ready to gild when your knuckle taps the surface without disturbing the size or coming away with residue.
Oil sizes may be thinned up to 10% with mineral spirits.
If thinned, the drying time may be reduced.
A Black Ox hair brush will produce a smooth even surface. Brushes are best cleaned with mineral spirits.
Always stir oil size to insure the blending of all components.

Porous surfaces should be sealed to create a smooth surface to gild.
Exterior projects may be sealed with a semi-gloss latex or oil based paint.
Shellac or a semi-gloss paint is recommended for sealing interior work.

LeFranc 3 Hour & 12 Hour Size

LeFranc 3 Hour Size is suitable for interior and exterior work.
It reaches tack in 3-5 hours depending on film thickness, temperature and humidity.
After reaching the proper gilding tack, it will remain open for gilding with genuine gold leaf for 4-6 hours.
The open time for gilding with metal leaf may be shorter, since metal leaf is heavier.
Allow the gilded surface to cure one week before sealing or glazing.
Always stir LeFranc size.
The driers in LeFranc size settle to the bottom of the container and must be stirred to produce a blended product.

LeFranc 12 Hour Size is suitable for all projects requiring a longer open time for gilding.
It reaches tack in 12-14 hours and will remain open for gilding for 8-12 hours.
LeFranc 12 Hour Size requires one month to cure fully before sealing or glazing.
Until fully cured, the gilded surface is fragile and should be protected from harm.
Always stir LeFranc size.
The driers in LeFranc size settle to the bottom of the container and must be stirred to produce a blended product.

Rolco Quick-Dry and Slow-Set Size

Rolco Quick-Dry Size will reach tack in 1-2 hours and will remain open for gilding for 1-2 hours.
In very dry and warm environments, it may reach tack in as little as 30 minutes and the open time for gilding may be greatly reduced.
It produces excellent results with metal leaf and is recommended for small projects or when time is limited.
Allow to cure for 24 hours before sealing.

Rolco Slow-Set Size is recommended for projects that may require a longer open time for gilding than Quick-Dry will allow.
It will reach a proper gilding tack in 6-8 hours and will remain open for gilding with genuine gold leaf for an equal amount of time.
The open time for gilding with metal leaf is usually less, as it is with other oil sizes.
Allow to cure for 24 hours before sealing.

Water Based Adhesives

Aqua Size & Wunda Size

Aqua Size and Wunda Size are popular water base sizes and serve as an alternative to oil size for interior projects.
Both have an extremely long tack time making it suitable for large scale interior projects or production gilding in manufacturing plants.

Aqua Size comes to tack in 25 minutes and stays open for 36 hours.
It is best to use Aqua Size full strength without diluting.
Aqua Size will cure to a hard surface after 36 hours.

Wunda Size comes to tack in 15 to 20 minutes and stays open for gilding for 36 hours and longer. It may be thinned up to 20% with water to increase its leveling properties and to increase the sheen of the gilded surface.
Unlike oil sizes, Wunda Size will never fully harden and the gilded surface should be sealed.

Aqua Size and Wunda Size are most appropriate when used to gild with metal leaf, but will produce acceptable results with genuine gold.
Porous surfaces should be sealed with a semi-gloss latex primer, prior to sizing. Aqua and Wunda Size are for interior use only.
Clean up as soon as possible with water or acetone.

Leaf Coverage Chart*
*Measurements are calculated without consideration for waste or overlap.