There are two kinds of coffee filter. Is either kind lint-free?

This question is not specific to any particular device, unless bits of fabric are devices. I ended up answering it myself in some ad hoc tests of various materials used to clean things, and wondering about a questions raised by my informal research.

Introduction:

In many instructions a lint-free cloth is specified, and the suggestion that a coffee filter can serve as the lint free cloth is included. There are two kinds of coffee filter: one is the flat-bottomed, ruffle-sided, typically white filter that was ubiquitous in the heyday of Mr. Coffee coffee makers. Melitta popularized the cone-shaped filter, a sort of cylinder with a hockey-stick-shaped seam that closes the bottom and makes an oblique-angle turn upwards, extending to the top edge of the filter. They can be white or unbleached. They are very popular in coffee-drinking and electronics-cleaning circles.

Web-search effort:

My internet search did not cough up any wisdom about or attention to this microprocessor-maintenance life-or-death matter, which might mean both types of filter are suitable for cleaning components. I did see many instances of Melitta-style filters used in tasks that call for lint-free cloth, among which no harm appeared to have been done, but that is not proof that they're lint-free. I found no instances of Mr. Coffee-style filters used for anything at all.

Empirical exploration:

I wetted various aspirants to lint-free status and rubbed them against a tightly woven black cotton fabric. I documented their lintiness under certain conditions in a photograph, which I will happily share if ifixit provides a way to do it.

Results:

A Melitta-brand cone style coffee filter shed fibers like a buffalo in springtime.

RATING: Poor

A Mr. Coffee-style coffee filter released a significant amount of fiber, but was markedly less generous than the Melitta filter.

RATING: Fair to Poor

An old chamois cloth used to dry cars several dozen times gave up a lot of DNA

RATING: Poor

A new cotton towel did leave lint on the shirt, but it was hard to see.

RATING: Seems okay to me, but don't take my word for it.

A polyester microfiber cleaning cloth held onto its molecules like a dilettante clings to treasured pretensions

RATING: Superior

My undertaking answered my question and posed a few new ones. Who started the rumor that coffee filters are lint-free? Given that they shed like molting cockatoos, why don't coffee filters have a reputation dropping lint that sets electronics on fire, shorts circuits or otherwise fails and bricks our electronic loved ones, as promised?

What I learned: Neither type of coffee filter can be considered lint-free when wetted in water and rubbed against dry, tightly woven cotton fabric. An old genuine chamois was almost as bad as the Melitta cone filter. A new cotton towel was less prone to shed lint than all but the microfiber cloth. A polyester microfiber cloth won the day, leaving nothing detectable behind.

What to clean your logic board with:

a) probably any absorbent material at hand, since people have been using coffee filters without disastrous consequences since the dawn of DIY computer repair

b) if you don't want to leave lint on your heat sinks and circuitry, a microfiber cloth. A cotton cloth isn't a bad bet, based on my findings. Test yours by wetting it and rubbing against smooth fabric in a contrasting color to determine its likelihood of leaving lint all up in your stuff.

Update (09/16/2017)

A picture of my lint-testing outcomes, in black-and-white and color, pretty much answered my original question. It also raises new questions.

Block Image

Block Image

Answered! View the answer I have this problem too

Is this a good question?

Score 1
Add a comment
Black Friday
Broken doesn't stand a chance.

1 Answer

Chosen Solution

First, I love you tenacity in trying to find out!

Lets move this over to a guide (under cleaning thermal paste in this case).

We do need to document what you wetted the filter with (water or a solvent) as that will have an impact on your testing as well as how the filter is used in this application.

One does need to be careful with polyester microfiber cloths as most are not ESD safe.

We use PIG PR70 Wipers from pig.com. Which has lasted us for a couple of years now! Great product for cleaning just about anything wet or dry. Hint: They do send samples ;-}

Was this answer helpful?

Score 2

Comments:

Thank you. I am glad you liked my tenacity in finding out. Not everyone does. It depends on the topic under investigation and whether they really did it or not.

Is moving it just a matter of copy and pasting to create a new post?

Back to the topic:

I used water to wet the contestants.

Useful information on the polarity of certain fibers

+ More Positive +

Wool

Viscose (one of six kinds of rayon, all made from cellulose, normally wood cellulose)

Cotton

Polyester

Polyacrylonitrile ("lightweight, strong, wrinkle-resistant acrylic")

- More negative -

I can't find anything that places linen on the continuum, but several sources say it doesn't accumulate static electricity. It is tough, absorbent, and fast drying. Probably low lint because of its long polymers.

TIL that fibers of the wool, silk, cotton, and linen fibers and the cellulose used to make rayon are natural polymers. Polyester and Polyacrylonitrile are synthetic polymers.

And Pig PR70 wipers are made from...a blend of cellulose and polyester.

by

@elcrashitan - Here's the start point to create the guide: Creating a Guide

by

Add a comment

Add your answer

El Crashitan will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 6

Past 30 Days: 18

All Time: 58