How to Spot a Premium Brick: 5 Quality Tests Every Builder Should Know

Compatible bricks have a quality range. At one end: premium ABS that is functionally identical to the original brand. At the other end: cheap thermoplastic that fades, warps, and disappoints. Here is how to tell the difference in under 30 seconds — without expensive testing equipment.

Test 1: The click test

Take two bricks of the same shape. Press them together firmly. Pull them apart.

• Premium ABS: Clean, audible click on connection. Slight resistance on separation. No flex or warping.
• Cheap brick: Soft or no click. Either too loose (no friction) or too tight (you have to twist to separate).

Premium bricks are engineered to a 0.005mm precision tolerance. Cheap ones are not.

Test 2: The color edge test

Hold a brick up to bright light and look at the edges where two surfaces meet.

• Premium ABS: Color is fully saturated throughout the entire brick. Edges look identical to faces.
• Cheap brick: Color is slightly lighter at edges or has a translucent "halo" effect where the plastic is thinner.

Cheap manufacturers use dyed plastic instead of color-throughout ABS. The difference shows up immediately under direct light.

Test 3: The seam test

Look at the bottom of a 2x2 brick. There should be smooth circular tubes inside. Run a fingernail along the seam where the inside meets the outside.

• Premium ABS: Imperceptible seam. Your fingernail glides across without catching.
• Cheap brick: Noticeable mold-line ridge. Your nail catches on it. Sometimes there is visible flash (excess plastic) you can pick off.

Mold-line quality is the single best indicator of factory standards. Premium factories trim and polish; cheap ones do not.

Test 4: The drop test

Drop a single brick onto a hardwood or tile floor from about waist height.

• Premium ABS: Sharp, almost ceramic "tink" sound. No damage.
• Cheap brick: Dull "thud" sound. Sometimes chips, splits, or visibly stresses at corners.

This test is unforgiving but reliable. ABS is famously impact-resistant. PVC and recycled plastics are not.

Test 5: The yellow test

If you have white bricks more than a year old, hold one against a brand-new white brick from the same set.

• Premium ABS: Effectively no visible yellowing after 5+ years of normal indoor display.
• Cheap brick: Visible yellowing within 6-12 months, accelerated by indirect sunlight.

This test takes time to run, but it is the long-term killer for cheap bricks. Yellowed white pieces ruin completed builds and cannot be reversed without aggressive hydrogen peroxide treatment.

Why this matters

Building sets are not consumables. A finished build is a multi-year display piece — sometimes a multi-decade one. The difference between premium ABS and cheap plastic is the difference between a build that looks great in 2036 and one that looks tired by 2027.

Every set on MyBrickOras passes all five of these tests. We have personally validated every single SKU against the original brand before listing it. The same click, the same color, the same long-term durability — at a smarter price.

Want to see our quality difference for yourself? Order any set and run these tests when it arrives. If it does not pass all five, return it within 30 days for a full refund.