11 votes

What Lego part(s) would hurt the most to step on?

I think this one would be in the top 5: Tile, Modified 2 x 2 with Pin (part 2460)
user avatar
9 votes
Accepted

What material are older soft (plant) parts made of?

According to Brickset, these parts have always been made of polyethylene, the only difference is that some of the material is plant-based since the Plants from Plants initiative. Can you tell the ...
user avatar
  • 13.8k
7 votes

Why do older bricks have greater clutch power?

This is a partial answer (or theory). The moulds for most of the basic bricks have been changed over the years to use less plastic while (hopefully) retaining clutch. 2 x N bricks were given ...
user avatar
7 votes

What Lego part(s) would hurt the most to step on?

The 1x1 brick is both small enough to mean that you get edges no matter which way up it is, and has all the sharp edges and corners of the 2x2 brick, just packed into a smaller, more evil form. That ...
user avatar
  • 426
7 votes
Accepted

Why are these hinged plates slightly different colors?

Quorneng's answer is spot on, even bricks that were from the same set might have been made from differing batches of a particular color and slight variances will produce differing colors. Purple is ...
user avatar
7 votes

BPA in older LEGO

Most LEGO and DUPLO parts are made from ABS plastic. ABS does not contain BPA. Here's a statement from LEGO about the safety of ABS: The majority of LEGO elements are made from ABS plastic (...
user avatar
  • 34k
6 votes

Strongest LEGO structuce - (1) Pillars

I am also going to recommend Technic as the stronger support option, but I would make the case out of "normal" Lego, and then implement 2 Technic rectangular "rings" around the case at the place of ...
user avatar
  • 16.5k
6 votes
Accepted

Why are these bricks slightly shorter than normal?

For starters, having that as a production error is completely impossible, given the industrial precision of our beloved bricks. The LEGO group has been incredibly careful for decades about the ...
user avatar
  • 230
6 votes

What Lego part(s) would hurt the most to step on?

I nominate this little bugger: Got it in a bulk lot, and oh boy is it painful to walk on. it rests flat on the ground thanks to the wings, and the crest is a nice touch for delicate underfoot.
user avatar
5 votes

What Lego part(s) would hurt the most to step on?

This assembly of pieces will not tickle, so let's dive in: First, the teeth are placed in reverse of each other so the foot and all that weight is forced to rock on the two little pointed tips. ...
user avatar
  • 8,658
5 votes

Why are these hinged plates slightly different colors?

The colour of virtually all plastics, like paint, is an 'added' pigment so it is difficult to maintain exactly the same colour. As others have pointed out some pigments are more susceptible to the ...
user avatar
  • 211
5 votes

Why do LEGO bricks yellow at different rates?

There are several reasons for this: There isn't just one formula for the ABS plastic that is used in LEGO. There are actually quite a few. Depending on the color, translucency, and function, the mix ...
user avatar
5 votes
Accepted

Strongest LEGO structuce - (1) Pillars

Generally LEGO Technic structures (pins and beams with holes) tend to be lighter and stronger as System structures (classic bricks). The generally accepted best practice among amateur and professional ...
user avatar
  • 13.8k
4 votes

Would LEGO use recycled plastic?

The LEGO Group has already created clear sustainability goals. TLG is currently investing money to try to find sustainable and non-petroleum based ways to design LEGO bricks. Here's some info about ...
user avatar
  • 34k
4 votes
Accepted

Is it safe to remove PC (polycarbonate) arms from minfigures?

The clear PC arms are more brittle, however you should be able to replace them at least once, since the torso you are placing it into is ABS - so there is a bit of a give/flexibility on that side. ...
user avatar
4 votes

Is LEGO element damaged at the molecular level when rubbed with rubbing alcohol?

The LEGO Group has been extremely careful about the formulation of all of the plastic parts they manufacture. I do not believe they ever used lead in any of their parts. Decades ago they removed ...
user avatar
  • 1,063
3 votes

Are silicone rubber bands safe for LEGO?

Silicone does not appear to be safe with ABS plastic This sounded like a good idea to me since silicone works well in other extreme circumstances like baking, but the quick research I've done says ...
user avatar
  • 5,069
3 votes

How to differentiate Cellulose acetate vs ABS LEGO bricks?

As 62Bricks has said, this can be an art. Based on my experience (in the UK): CA bricks tend to have less clutch (stickiness to other bricks) than ABS bricks. I'm not sure if this is because they ...
user avatar
  • 8,851
3 votes

12V LEGO train tracks splinter

While I can't speak of the handling of these parts, the possibility of receiving official replacement parts from TLG is surely zero. That leaves us only the second-hand market, which fortunately ...
user avatar
  • 13.8k
3 votes

LEGO elements working with capacitive touchscreens?

BrickLink only has that one match for conductive, so I'm guessing that's it.
user avatar
  • 4,485
3 votes
Accepted

LEGO elements working with capacitive touchscreens?

Any metallic or metal coated parts (spoon, aluminium foil, pen) should be usable with a contemporary touchscreen, although proper touch recognition still requires a human (or an equivalent capacitor) ...
user avatar
  • 13.8k
2 votes

How to differentiate Cellulose acetate vs ABS LEGO bricks?

To sort ABS bricks from CA bricks can sometimes be difficult. What helps is they SOUND differently. An ABS brick emits a higher pitched sound when dropped than a CA brick which sounds more like a "...
user avatar
  • 121
2 votes

Strongest LEGO structure - (2) Floor

Just like in the other question, I would recommend a Technic frame with more depth than your original idea and some plating on top of it. This project nicely illustrates how to build stable Technic ...
user avatar
  • 13.8k
2 votes
Accepted

Why do LEGO parts break?

In my experience, this happens when the lego has been washed with a too strong detergent or too high temperature...
user avatar
2 votes
Accepted

I am looking for robot constructor general plastic parts

The first picture is from Elector, the second is kai robot. They are both robotic kits from Iran, you can order kits from their site. If you are looking for a Lego solution, the Lego Eduction ...
user avatar
  • 11k
2 votes

LEGO sticky after painting?

I suspect that you used an acrylic paint with a solvent that softens ABS plastic. Your bricks may take quite some time to harden. It's possible they never will.
user avatar
  • 1,063
2 votes

Why do older bricks have greater clutch power?

I may found a hint onto what's going on with old elements made of ABS on sister website - Chemistry.SE. That question discuss other problem with ABS plastic - brittleness, however answer provide some ...
user avatar
  • 19.7k
2 votes

Lubricating train axles - which oil to use?

Generally for this sort of thing the recommendation is a "light machine oil" (the wording from the Hornby Maintenance sheets). These are "non-penetrating" and so won't damage the ...
user avatar

Only top scored, non community-wiki answers of a minimum length are eligible