Info - Filter & Wash

 The new True Earth’s FILTER & WASH inherit the already excellent quality of the previous Transparent Filters, in a new even more workable formulation.


  • True Earth’s FILTER & WASH are real filters. While all other filters or washes on the market are formulated with a milled pigment dissolved in a binder, the "coloring" agent of True Earth’s FILTER & WASH is a very thin resin, formulated specifically to let the light shine through, gradually altering the colors without suffocating them.
  • Versatility. As filters, as washes, for leaks and streaks. By brush or airbrush. And for  light & shadow effects, enhancing model's shape with a method of post-shading, convenient and fast, especially on camouflaged vehicles or painted in various colors.
  • Pleasant to use, a long workability time thanks to True Earth’s exclusive  SDW technology.
  • No solvents, odourless, a just-water formulation.
  • Purity. No residue thanks to the all resin formulation, Use them to the last drop.
  • They are not aggressive, and they can be spread on any sort of paint without a protective clear varnish.
  • Extremely flowy into airbrush, without ever clogging the nozzle.
  • Extremely fast cleaning of airbrush and brush, with water only.
  • Long life of the fresh product in the palette, even for hours depending on the amount. If thickened they can be restored with a bit of  water.
  • Adjustable drying time, which allows easy retouches and softer feathering.
  • Easily removable within hours from application just with soapy water.

Comparison with Transparent Filters

Those who until now have used True Earth’s Transparent Filters,  will appreciate that, with  an adjustable-as-you-like drying time, these new formulations are easier and more pleasant to use, with a softer feathering, better flow into airbrush, and a slightly more matte finish.

Versatility increses, and it will be easier to achieve leaks and streaks more or less defined.

The post-shading methods explained untili now into tutorials and books do not change, apart for a greater ease in putting them into practice. 

Darker tones are even more concentrated, and will need a higher thinning, while the former PAINT FADING tones, now LIGHT & FADING, have an increased progressivity.

To facilitate identification, names and colors of some of the most used Transparent Filters were taken by the new FILTER & WASH.

You'll also notice that in spite of the new formulation of the product, the price is unchanged.

Easy method Filter + Wash

This is the easiest use method.

It is the right method whenever we want the same FILTER & WASH tone both for an overall filter than for pinwashes.

A matt to satin basecoat is preferable, and so we spare the usual clear gloss coat over paints.

A True Earth's FILTER & WASH is thinned in clean, pure water. 1 part filter for 1 part water. Spread it over the chosen parts, and remove excess from all those relieved, plain and undetailed parts. Let it dry in a dust-free place.

Nothing more is needed, and in an only step you achieve a clean and sharp effect, without solvents nor odours.

Use as Filters


It 's called "overall filter" a thin film of filter, more or less uniform of the model, which adds depth to the colors, blends them together, favors the scale effect and realism.

Given their pureness, and absence of the usual pigments into the formulation, True Earth's FILTER & WASHes can be used as true "photographic filters". Able to alterate

Given their characteristics of purity, and the absence of classical pigments in the formulation, True Earth's FILTER & WASHes  can be used as if they were real "photographic filters". Able to alter to taste colors and color combinations, not overwhelming them, but enriching the chromaticity.

Spread on the model a thin layer of filter, pure or slightly diluted in water. Get an even coat by  brushing in the same direction. Alternatively, the airbrush is the fastest method. See the airbrushing topic.

For this type of application, no clear varnish is needed over the paint, and a matt or slightly satin basecoat is preferable to a glossy one, both for brush and airbrush.

Use as Washes


For washes on intricated areas, filled with details, a moderately matt-to-semigloss paint underneath works well. If the paint is too matt, simply paint a layer of True Earth's CRYSTAL LOCK and let it dry some hours before applying the wash.

For washes,  True Earth’s  FILTER & WASH can be used pure or pre-diluted. As a start for tryouts,  1 part filter to 1 part water.

First wet the part to be treated with water, to facilitate the flow of the wash in the interstices, and then distemper the filter thonned as told on ths surface. Clean away excess from flat and undetailed parts. Let it dry in a dust free place.


The result is perfectly clean and sharp, with no smell, no solvents...



Washes only made around raised details, riveting, into corners and recesses, to let them stand out.

It 'a particularly useful technique whenever for example we have used a given tone of FILTER & WASH as a global filter, and we want to use a darker one only for the definition of details. Or whenever we want the maximum cleanliness, for example to emphasize the shape of a new machine, without wear.

A satin-to-semigloss surface is preferable.  If the paint is too matt, simply paint a layer of True Earth's CRYSTAL LOCK and let it dry some hours before applying the wash.

For the earliest tryouts, thin down a part of FILTER & WASH with 1 part water. Add a minimal amount of filter , only around the details, touch rivets, fill recessed panel lines and turn around raised panels. For a better feathering, avoid any excess.

The result will be a clean and sharp enhance of details.

Use by Airbrush

True Earth’s  FILTER & WASH are  airbrushed with even greater ease than previous Transparent Filters, either pure or diluted in water alone.

For airbrushing over the whole model, or anyway on large areas, use them pure or thinned as you like just with water. To shorten drying time, mix them with SWD GLOSS ADDITIVE or with the additive + water. The underlying paints are preferably matt.

Proportionally fit the air pressure in function of the density of the filter. (Less dilution = higher pressure).



For airbrushing Filter & Wash over little areas, or very thin lines, fit a higher  pressure, ab. 22 to 27 psi - 1,5 to 1,8 atm. Airbrush nozzles ranging from 0,15 to 0,2mm. If you have it, keep the trigger regulator on the tail of the airbrush almost closed. For this task you can use them unthinned, or thinned with simple acohol+water o isopropanol+water. Unless being not acrylics, they can also be thinned with many acrylic paint thinners.

The best way to avoid any excess, is to work slightly in backlight, to see the wet reflection sprayed on the model, instead of expecting an immediate color change, as it would be for a paint.

Mind that True Earth's FILTER & WASH  are not paints. They work in transparency and are not designed to cover. Then you spray only minimal amounts on the area. Let it dry, check result and if needed add a next layer, working in progressive steps.



Aibrush cleaning is unqqualled. Just some drops of water are enough for a clean tool, because the all- resin formulation flows away without adhering to the airbrush.


True Earth's FILTER & WASH, thanks to their pureness, can be applied in a sequence to achieve realistic post-shading effects.

Adding lights and shadows to enhance a three-dimensional effect made thorough FILTER & WASH is particularly useful on camouflages, since we will not need to highlight and shade each colosr separately, but lighter and darker filter tones will act on all colors, adding to harmony and scale-down effect.


Drying time

Drying times of the new FILTER & WASH True Earth are slower than previous Transparent Filters, to the benefit of the workability and the possibility of correction. Anyway faster than any enamel or oil product.

The dilution with water and SDW Gloss Additive, suggested just for airbrush uses, proportionally speeds up  the drying time.

A few drops of filter in a palette will be usable for a long time, even for hours, in proportion to the quantity and temperature. If it thickens, you can refresh it with a minimum of water.

No solvents, odorless.

Like all other True Earth's products, FILTER & WASH are absolutely free of solvents, hazardous or flammable substances, and are completely odorless.

For dilution always use just clean water.


True earth’s FILTER & WASH are removable simply with soap and water within some hours.

Choice of suitable Filters

Given the features of progressiveness and transparency of True Earth’ FILTER & WASH, any filter can be used on any color, depending on what we want to do.

They are formulated to suit the colors and even the most complex camouflage schemes, favoring the overall realism of the model.

The method to choose a filter is extremely simple: just make a comparison between the colors of the model and the filter tone, to see what we can get from its application.

For example Light & Fading 1, with its light and warm tone, if used as a global filter on this camouflage has minimum impact on the sand yellow  base, because the two colors are very similar. He lightens the brownish red, and warms up the green, which is a cool tone, lightening it. Then we get a greater overall harmony of the colors, which increases in proportion to the number of filter layers that we spread .

And you also read the specifications and examples contained in the description of each filter, to find the combination that suits the purpose.

Back to the Shop