3M Crystalline 70 and 3M Crystalline Black 70 (CR BLK 70) should not be treated as one identical specification. 3M’s April 2022 Crystalline technical data sheet lists Crystalline 70, while its August 2025 Crystalline Series sheet lists CR BLK 70 with different VLT, TSER, UV and glare values. Buyers should verify the exact product code and data sheet before comparing performance or selecting a film.
This guide separates the two documented variants so older Crystalline 70 data is not mixed with newer Crystalline Black 70 data. For the broader film family and installation options, see 3M Crystalline window film.
Crystalline 70 vs Crystalline Black 70 at a Glance
| Metric on Auto 75 reference glass | Crystalline 70, 2022 sheet | CR BLK 70, 2025 sheet |
|---|---|---|
| Visible Light Transmission | 58% | 64% |
| Total Solar Energy Rejected | 55% | 51% |
| UV Block | 99.9% | 99.9% |
| Glare Reduction | 21% | 13% |
| Infrared Rejection, 900–1,000 nm | 97% | 97% |
| Infrared Energy Rejection, 780–2,500 nm | 68% | 65% |
These values use 3M’s automotive reference-glass test configuration. They are reference data, not a guarantee that every vehicle will produce the same completed reading.
What Is Legacy 3M Crystalline 70?
The April 2022 3M Crystalline Series technical sheet lists Crystalline 70 as a high-light-transmission shade in the original Crystalline range. On Auto 75 glass, 3M publishes 58% VLT, 55% TSER, 99.9% UV block, 21% glare reduction, 97% IRR and 68% IRER.
On 6 mm clear reference glass, the same 2022 sheet lists Crystalline 70 at 69% VLT, 50% TSER, 99.9% UV block, 22% glare reduction, 97% IRR and 69% IRER.
What Is 3M Crystalline Black 70?
The August 2025 3M Crystalline Series technical data sheet lists CR BLK 70, or Crystalline Black 70, as a separate documented shade. On Auto 75 glass, it is published at 64% VLT, 51% TSER, 99.9% UV block, 13% glare reduction, 97% IRR and 65% IRER.
On 6 mm clear reference glass, the 2025 sheet lists CR BLK 70 at 78% VLT, 43% TSER, 99.8% UV block, 12% glare reduction, 97% IRR and 63% IRER.
Why the Specifications Differ
The product names belong to different published data-sheet versions and the measured values are not identical. That means an installer or buyer should not take a CR BLK 70 figure and label it simply as “Crystalline 70” without checking the actual roll, product code and regional product documentation.
Product availability can also vary by market. A local distributor may stock one documented version, another regional version or remaining inventory. The correct technical sheet is the one that matches the exact film being installed.
What VLT Means for a 70-Series Film
Visible Light Transmission measures how much visible light passes through the complete filmed-glass test system. A higher VLT usually produces a lighter visual result and allows more visible light through the glass.
The final vehicle reading is not determined by the shade name alone. Factory glass already has its own VLT, colour and coatings. This is why the 2025 CR BLK 70 sheet reports 78% VLT on clear reference glass but 64% on Auto 75 automotive glass.
TSER vs IRR vs IRER
TSER
Total Solar Energy Rejected measures broader solar-energy performance of the filmed-glass system. It should not be replaced by a single narrow-band infrared percentage when comparing overall solar control.
IRR
3M defines IRR as infrared rejection over the narrower 900–1,000 nm range. Both the legacy Crystalline 70 and newer CR BLK 70 are published at 97% IRR in the cited sheets.
IRER
IRER measures solar infrared energy rejection over the broader 780–2,500 nm range and accounts for transmitted and absorbed infrared energy that may be reradiated into the vehicle. The two 70 variants publish different IRER values, so this metric should be matched to the exact product sheet.
Is Crystalline 70 a Clear Tint?
It is better described as a lighter or high-visibility shade than as completely clear. Legacy Crystalline 70 and CR BLK 70 both reduce visible light, and the completed appearance changes with factory glass, interior colour, exterior lighting and viewing angle.
Can a 70-Series Film Be Used on a Windshield?
A lighter shade may be considered for certain glass positions where the film, vehicle and current local requirements permit it, but the product name does not establish legality. Windshield and front-side requirements can be stricter than rear-glass requirements, and factory glass changes the finished VLT.
Before installation, confirm the current rule for the vehicle and glass position and verify the finished glass-and-film result rather than relying on the “70” label.
Does Crystalline Interfere with GPS or Mobile Signals?
3M describes the Crystalline platform as metal-free and designed without the electronic-interference concerns associated with metallized film. Vehicle antenna placement, other coatings and hardware can still affect real-world reception.
How to Verify Which 70 Film You Are Buying
- Ask for the exact film name and product code.
- Match that code to the current regional 3M technical data sheet.
- Confirm whether the film is legacy Crystalline 70 or CR BLK 70.
- Compare VLT, TSER, UV, glare, IRR and IRER using the same reference glass.
- Confirm which glass areas are included in the installation.
- Check the applicable warranty documentation for that product and market.
- Confirm current vehicle and window-position requirements before installation.
Crystalline 70 vs Darker Crystalline Shades
A 70-series shade transmits more visible light than darker Crystalline options. That can support a lighter appearance and easier low-light visibility, while darker shades generally provide more visible-light reduction and stronger glare reduction.
Do not assume the darker option always rejects more infrared energy. Compare shade-matched TSER, IRER and test conditions. For the technology behind the range, see the 3M Crystalline technology guide. For a darker-shade example, see the Crystalline 40 guide.
Frequently Asked Questions
Are Crystalline 70 and Crystalline Black 70 the same?
They should not be treated as identical specifications. 3M’s 2022 sheet lists Crystalline 70, while its 2025 sheet lists CR BLK 70 with different published VLT, TSER, glare and IRER values.
What is the VLT of legacy Crystalline 70?
The 2022 3M sheet publishes 58% VLT on Auto 75 reference glass and 69% VLT on 6 mm clear reference glass.
What is the VLT of Crystalline Black 70?
The August 2025 sheet publishes CR BLK 70 at 64% VLT on Auto 75 glass and 78% on 6 mm clear glass.
Which 70 version rejects more total solar energy?
On the cited Auto 75 reference glass, the 2022 Crystalline 70 sheet lists 55% TSER, while the 2025 CR BLK 70 sheet lists 51% TSER. The comparison applies only to those stated test configurations.
Which data sheet should I use?
Use the technical data sheet that matches the exact product code, market and film being installed. Do not combine figures from legacy Crystalline 70 and CR BLK 70.
