About this product
Part Number: FBR09
Protostar Self-Adhesive Hi-Tack Flocking Board (10cm Increments Custom Cut)
The blackest flocking material we've ever found!
Applying an ultra-black lining to your telescope tube has never been easier. Flockboard is a light trap surface manufactured onto a low-density plastic sheet. Simply roll it up, and let it snap out against the tube wall. It stays in place without glue or tape. Flockboard cuts easily with scissors or a utility knife, and also drills cleanly. Small screw holes can also be poked through cleanly using just a pointed tool.
Typically used to line the interior of a Newtonian telescope's tube for enhanced contrast.
Made in the USA.
As a guide, use 1-2x 1m rolls for a six-inch f5 Newtonian, 2-3x 1m rolls for an 8-inch, 3-4x 1m rolls for a 10-inch and 5-6x 1m rolls for a 12-inch.
This is for a 10cm / 3.93" long piece with a 61cm / 24" width. To order a custom length simply round the length you require up to the nearest 10cm and then divide by ten to find out how many 10cm pieces to order.
Minimum order = 10x 10cm pieces.
Thickness: 1.02mm / 0.040".
- Weight: 0.09g/cm2 / 0.02oz/in2
- Avg. visible reflectivity @ 0º incidence angle < 0.4%
- Avg. visible reflectivity @ 80º incidence angle < 0.7%
Spectral Reflectivity Graph
1) Is the improvement really that noticeable after applying flocked light trap material?
On bright planets like Jupiter and Venus, you should be able to easily see an improvement in field glare surrounding the planet (assuming your original condition was a simple painted tube wall). Contrast on the moon is also noticeably improved. The improvement is more subtle on deep space objects, though the flocked paper does a good job at reducing glare from nearby bright objects like streetlights, house lights, etc.
2) How hard is it to install flocking?
For most tubes or structural parts it is not difficult to install. Small diameter (under 8" ID), and long tubes are the most difficult to install the flocked paper in. It is recommended to install the material in manageable sections, starting from the middle of the tube and working out to the ends. Don't worry too much about small imperfections in your installation job, as they will be invisible when the job is done.
3) Does dew or moisture damage the flocked paper?
Protostar flocked paper is a completely synthetic-based material, so moisture won't deteriorate it.
4) Does the flocked material have good thermal insulation properties?
The Hi-tack self-adhesive flocked material is a poor insulator by itself. If you are trying to insulate your metal telescope tube, you should line it with an insulating material (e.g., cork) before applying the flocked light trap. The FlockBoard has a better insulating property, so it is recommended for metal tube applications.
5) What are the light absorbing properties of Protostar light trap material?
Protostar light trap products are designed for the visible spectrum (~400-700 nm) where it absorbs over 99% of incident light. It also attenuates in the near-IR and near-UV by over 80%. (See spectral reflectivity graph above.)
6) How well does Protostar Hi-tack flocked material stick surfaces?
The Hi-tack self-adhesive formula sticks aggressively to most surfaces, though carbon fibre and fibreglass surfaces frequently require a separate adhesive to hold the edges in place. Flat black painted surfaces that have "chalked up" might also require an extra adhesive. If you have doubts about your surface, do a test application using a small sample to see how well it sticks to your particular surface.
7) Should I clean or prepare my tube's inside wall before applying Hi-tack light trap material?
No, special preparation of the tube wall is not necessary. In fact, if your tube wall is already painted, cleaning with alcohol or other solvents can soften the paint. This reduces the self-adhesive's tackiness. It's generally best to just apply the material directly even if you suspect it's a little dusty.
Downloads / Manuals
The following manuals and downloads are available for this product:
FlockBoard Installation Manual (PDF)
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