Golden Heavy Body Acrylics - Naphthol Red Medium 2 oz Tube


Regular Price $13.19

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  • Availability: In stock
  • Product SKU: #1220-2
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Quick Overview

Naphthol Red Medium (Heavy Body)

This is a darker variation of our Naphthol Red, serving as an affordable single-pigment alternative to Cadmium Red Medium that is less opaque and lightfast. (Series 5)

  • Pigment Classification: Synthetic Organic
  • Colour Index Name: PR 5
  • Chemical Description: Naphthol ITR
  • Opacity/Transparency: 5
  • Lightfastness Rating: II
  • Permanency: Very Good
  • Also Available in OPEN, Fluid, High Flow
  • Product Description
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Pigment Identification

Lightfastness Rating

The Lightfastness Ratings are provided by the American Society for Testing and Materials (ASTM) in the standard for "Artists' Acrylic Emulsion Paints". (ASTM D 5098, Annual Book of Standards, Volume 6.02). Colors with a Lightfastness Rating of I, are considered Excellent ("Exc.") and those with a Lightfastness Rating of II, are Very Good ("V.G."). Where Lightfastness Ratings have not been obtained according to ASTM test protocol, "N/A" is used. In those cases, data from pigment manufacturers and our own test facilities have been used and an appropriate description assigned under Permanency.

Lightfastness I: Excellent: Artist colors are let down with white to arrive at a pastel shade. These samples are exposed to an accelerated dose of of light energy equivalent to that which would be expected to occur during approximately 100 years of museum-lit conditions. This exposure is condensed into approximately 15 weeks of testing time, or less, depending upon the accelerated test methods used. For the purposes of the official test, before and after color difference is determined using a spectrophotometer, and difference units are mathematically calculated. Less than 4 units’ colour change earns a color the designation of Lightfastness I. In practicality, this means that a visual comparison of the unexposed and exposed samples, when held adjacent, would reveal, at worse, a barely perceptible color change.

Lightfastness II: Very Good - Under the same test conditions, a visual comparison of adjacent unexposed and exposed samples will reveal a perceptible color change. This change will quickly become imperceptible to most observers as the sample pieces are moved apart from one another. When expressed mathematically, change falling within the range of 4-8 units is covered by this category.

Perm: Lightfastness and durability based on our testing and manufacturer's data.

** The identified colors are sensitive to a combination of moisture and UV radiation and are not recommended for outdoor use.

Opacity/Transparency

We have determined that an eight-point scale is most appropriate for describing the properties of our colors. We have assigned each color in the chart a number from 1 (most opaque) to 8 (most transparent) to indicate the opacity/transparency of that color.

C.I. Name / C.I. Number

The Colour Index Name and Number are internationally recognized codes assigned to a particular "colorant" by both the Society of Dyers and Colourists and the American Association of Textile Chemists and Colorists. The C.I. Name consists of the category (type of dye or pigment), general hue and serial number, based on its chemical constitution. For example, PB 60, Anthraquinone Blue, indicates a specific Pigment Blue. The C.I. Number is a five-digit reference number assigned in the Colour Index based on the chemical structure of a colorant, regardless of usage class. For more information on these please see the following:

Type: Designates whether the pigments used in a color are based on Organic or Inorganic chemistry. When containing both types, the term Mixed is used.

Permanency

  • Exc. - Excellent
  • V.G. - Very Good
  • Poor

Abbreviations

  • C.P. - indicates concentrated cadmium pigments (CC).
  • G.S. - Green Shade
  • B.S. - Blue Shade
  • R.S. - Red Shade
  • Y.S. - Yellow Shade

Additional Information

Brand Golden
Country of Manufacture United States

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My survival stash of Derwent Artbars just arrived in perfect condition, and sooner than expected.
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I wanted to let you know that I just received my online order of my favourite St. Armand Paper plus markers.  I am so impressed with your service – thank you so much.   I am a member of our local art centre here in Kimberley BC and we have very few choices of where to purchase our supplies.  We usually leave our buying list to when we make our four hour journey into Calgary.   You have made our lives so much simpler.   I will passing on your website to my artist group of friends. 

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Thanks very much Bob, the parcel arrived last Monday and the paintings are already hanging on the wall. I appreciate your excellent service. 

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I received your order promptly. I'm very impressed on how well packaged it was, as well as the choice of art supplies you have. I've now added you on my list of go-to suppliers...

Great job!

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Jennifer Dany Aube

I do not do large orders often but have ordered with you once before. Your paint prices are so much better than Toronto art stores. If there are any product samples that you want to get rid of, I would be happy to receive them as I experiment with a lot of different supplies. Please save on packaging and send everything at one time. I stopped ordering from Amazon, because their overuse of packaging is out of control, and I prefer to support Cdn businesses as much as I can. Thank you for your great service, I had a great experience with my last order.

- Jennifer Dany Aube

Claudia Jorio-Cortell

I just wanted to drop you a note to thank you for sending, at no charge, the taper point shaper, I really appreciate it. Aside from this, I meant to drop you a note after I received my previous order which was also my first. Thanks for taking such great care in packaging the items purchased, such professionalism is rare to find, thank you!

I hope I’ll be able to  broaden the array of items I will order from your store, I wish you’d carry PastelMat paper J

Take care

- Claudia Jorio-Cortell