Missprinting cleaning

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Hi experts, I asked our chinese board manufacturer about ... - May 23, 2018 by Diego

Drink the Absolut IPC published the Stencil and Misprinte... - May 30, 2018 by davef

I wonder if I can convince corporate that we require 55 gall... - May 31, 2018 by Sr. Tech

hahaha, I first thought the same joke and researched a bit. ... - Jun 01, 2018 by Diego

Diego

#80460

Missprinting cleaning | 23 May, 2018

Hi experts,

I asked our chinese board manufacturer about their recommended procedure to clean miss-printing.

The answer was that they use Absolut Alcohol while use IPA currently and we are moving to a water based cleaning agent with ultrasound.

They justify the Absolut Alcohol becouse if they have to use the water based agent, then they have to wash and dry after ultrasound.

What do you recommend?

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davef

#80483

Missprinting cleaning | 30 May, 2018

Drink the Absolut

IPC published the Stencil and Misprinted Board Cleaning Handbook (IPC-7526). Free download here: http://shop.ipc.org/IPC-7526-English-D

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Sr. Tech

#80488

Missprinting cleaning | 31 May, 2018

I wonder if I can convince corporate that we require 55 gallon drums of Vodka to clean circuit boards based on this post.

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Diego

#80492

Missprinting cleaning | 1 June, 2018

hahaha, I first thought the same joke and researched a bit.

So to clarify to anyone reading this post, what the chinese guys called Absolut Alcohol is not the Vodka brand, it is Ethanol, which has <1% water contents, also called dehidrated alcohol, while IPA is 30% water. So you can see that they try to avoid oxidation by using the Ethanol.

https://medical-dictionary.thefreedictionary.com/absolute+alcohol

https://www.brainstuffshow.com/blogs/good-question-what-is-the-difference-between-alcohol-ethanol-denatured-alcohol-rubbing-alcohol-methanol-and-isopropyl-alcohol.htm

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