Forums

LCD cleaning

Started by Don Y August 15, 2015
On 8/16/2015 10:36 AM, John S wrote:
> On 8/16/2015 11:55 AM, Don Y wrote: >> On 8/16/2015 9:32 AM, John S wrote: >> >>>> [1] Of course, you *make* this from distilled water and isopropyl >>>> alcohol -- save the "good stuff" for drinking! :> >>> >>> I recommend Everclear (190 proof) available at the liquor store. Very few >>> impurities. >> >> Yes, I use it for making "extracts" (e.g., for baking flavorings). It's >> far more expensive than isopropyl alcohol; not keen on using that to clean >> screens! :-/ > > I can usually clean my screen by first using a soft brush to remove the dust > and then the microfiber wipe with no chemicals applied. You must have a > difficult environment if you need a solvent.
I was asking for a friend -- who's not keen on having to mix up an alcohol+water "mister". Note that many people don't use their displays as "view only" devices. Some have a habit of pointing to things *on* the screen (thus oils from hands). I've also seen *pen* marks on screens (d'uh... whatever you've underlined won't be there, later!). In refurbishing recycled monitors, you encounter stickers, asset tags, post-it notes, cellophane taped "stuff", etc. on the display surface of monitors. The worst, by far, is masking tape that has been there WAY too long. Getting off the residue is a significant accomplishment! [Don't try this at home]
On Sun, 16 Aug 2015 15:14:01 -0700, the renowned Don Y
<this@is.not.me.com> wrote:

> >I was asking for a friend -- who's not keen on having to mix up an >alcohol+water "mister". > >Note that many people don't use their displays as "view only" devices. >Some have a habit of pointing to things *on* the screen (thus oils >from hands). I've also seen *pen* marks on screens (d'uh... whatever >you've underlined won't be there, later!).
And white-out if you have to deal with blondes. ;-) Seriously, people pointing at stuff on my screen and touching the screen **right where I have to look** with their greasy oily little fingers is a pet hate.
> >In refurbishing recycled monitors, you encounter stickers, asset >tags, post-it notes, cellophane taped "stuff", etc. on the display >surface of monitors. The worst, by far, is masking tape that has >been there WAY too long. Getting off the residue is a significant >accomplishment! > >[Don't try this at home]
They must use really cheap horse hoof glue on paper masking tape - there are modern temporary adhesives that are so much better (eg. post-it notes). --sp -- Best regards, Spehro Pefhany Amazon link for AoE 3rd Edition: http://tinyurl.com/ntrpwu8 Microchip link for 2015 Masters in Phoenix: http://tinyurl.com/l7g2k48
On 8/16/2015 11:55 AM, Jeff Liebermann wrote:
> On Sun, 16 Aug 2015 09:55:22 -0700, Don Y <this@is.not.me.com> wrote: > >> On 8/16/2015 9:32 AM, John S wrote: >> >>>> [1] Of course, you *make* this from distilled water and isopropyl >>>> alcohol -- save the "good stuff" for drinking! :> >>> >>> I recommend Everclear (190 proof) available at the liquor store. Very few >>> impurities. > >> Yes, I use it for making "extracts" (e.g., for baking flavorings). It's >> far more expensive than isopropyl alcohol; not keen on using that to clean >> screens! :-/ > > $26/liter for Everclear. > A can of hardware store denatured alcohol is about $6/liter. > Drugstore 91% alcohol is about $4/liter. > This is not a difficult decision.
Yes. As was the decision to use everclear to make my own "extracts" instead of paying the exorbitant prices at the grocery store (if you bake *seldom*, the price penalty is small; if you bake *often*, you start to grumble at the price of all the "repackaged alcohol" that you are buying!)
In article <it91tad4gd3ifb1bvq9njh2qmjag40sok2@4ax.com>,
 Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> 
 wrote:

> On Sat, 15 Aug 2015 18:44:07 -0700, Don Y <this@is.not.me.com> wrote: > > >Hi, > > > >I've always advocated "100 proof"[1] alcohol and a microfiber rag to > >clean LCD monitors. Is there a commercial product (that doesn't > >have silly additives, dyes, etc.) that I can recommend to a friend > >for the same purpose (albeit much more expensive)? > > > >Thx, > >--don > > > >[1] Of course, you *make* this from distilled water and isopropyl > >alcohol -- save the "good stuff" for drinking! :> > > Isopropyl alcohol generally has oil added ("rubbing" alcohol). > > I use denatured alcohol straight or water diluted as my cleaning > solution. > > (You can buy denatured alcohol in the paint department of most > hardware stores.) > > ...Jim Thompson
Isopropyl alcohol almost never has oil added but all non-drinkable alcohols may have bitter flavors added to them. It varies by brand and checking is as easy as letting a drop evaporate on glass. The other problem with pure alcohol is that it tends to dissolve a bit too much, like skin oils and metal oxides, and deposit them to the glass. Adding a bit of mineral free water can make it a lot more practical for cleaning outside a laboratory. -- I will not see posts from astraweb, theremailer, dizum, or google because they host Usenet flooders.
On 8/16/2015 4:22 PM, Spehro Pefhany wrote:
> On Sun, 16 Aug 2015 15:14:01 -0700, the renowned Don Y > <this@is.not.me.com> wrote: > >> >> I was asking for a friend -- who's not keen on having to mix up an >> alcohol+water "mister". >> >> Note that many people don't use their displays as "view only" devices. >> Some have a habit of pointing to things *on* the screen (thus oils >>from hands). I've also seen *pen* marks on screens (d'uh... whatever >> you've underlined won't be there, later!). > > And white-out if you have to deal with blondes. ;-) Seriously, people > pointing at stuff on my screen and touching the screen **right where I > have to look** with their greasy oily little fingers is a pet hate.
Exactly. Use the mouse. There is a reason that they *call* it a POINTING DEVICE!! Touchscreen in the car is another annoyance. Perpetually trying to clean fingerprints off it (which make it harder to read in certain light).
>> In refurbishing recycled monitors, you encounter stickers, asset >> tags, post-it notes, cellophane taped "stuff", etc. on the display >> surface of monitors. The worst, by far, is masking tape that has >> been there WAY too long. Getting off the residue is a significant >> accomplishment! >> >> [Don't try this at home] > > They must use really cheap horse hoof glue on paper masking tape - > there are modern temporary adhesives that are so much better (eg. > post-it notes).
I think the mantra re: masking tape is that it should only be used as a TEMPORARY measure. Let it dry out (or get BAKED on) and you'll never get the last bits off without mechanical intervention!
Den mandag den 17. august 2015 kl. 01.39.40 UTC+2 skrev Don Y:
> On 8/16/2015 4:22 PM, Spehro Pefhany wrote: > > On Sun, 16 Aug 2015 15:14:01 -0700, the renowned Don Y > > <this@is.not.me.com> wrote: > > > >> > >> I was asking for a friend -- who's not keen on having to mix up an > >> alcohol+water "mister". > >> > >> Note that many people don't use their displays as "view only" devices. > >> Some have a habit of pointing to things *on* the screen (thus oils > >>from hands). I've also seen *pen* marks on screens (d'uh... whatever > >> you've underlined won't be there, later!). > > > > And white-out if you have to deal with blondes. ;-) Seriously, people > > pointing at stuff on my screen and touching the screen **right where I > > have to look** with their greasy oily little fingers is a pet hate. > > Exactly. Use the mouse. There is a reason that they *call* it a > POINTING DEVICE!! > > Touchscreen in the car is another annoyance. Perpetually trying to > clean fingerprints off it (which make it harder to read in certain > light). > > >> In refurbishing recycled monitors, you encounter stickers, asset > >> tags, post-it notes, cellophane taped "stuff", etc. on the display > >> surface of monitors. The worst, by far, is masking tape that has > >> been there WAY too long. Getting off the residue is a significant > >> accomplishment! > >> > >> [Don't try this at home] > > > > They must use really cheap horse hoof glue on paper masking tape - > > there are modern temporary adhesives that are so much better (eg. > > post-it notes). > > I think the mantra re: masking tape is that it should only be used > as a TEMPORARY measure. Let it dry out (or get BAKED on) and you'll > never get the last bits off without mechanical intervention!
yep, lots of people make the mistake of leaving the tape on for a few days when painting windows you can get UV resistant masking tape that won't baked on -Lasse
On Sun, 16 Aug 2015 16:39:49 -0700, Don Y <this@is.not.me.com> wrote:

>I think the mantra re: masking tape is that it should only be used >as a TEMPORARY measure. Let it dry out (or get BAKED on) and you'll >never get the last bits off without mechanical intervention!
The blue masking tape doesn't harden, but costs 3 times as much. I managed to find a new way to destroy something with tape. Someone bashed in the red tail light on my car in the parking lot. I didn't have time to deal with it, so I taped up the crack and hole with clear cellophane packing tape. (It was raining). I then forgot about it for about 6 months. The tape came off easily enough, but the glue remained attached to the red tail light lens. I attacked the glue with every solvent that I could find that didn't also attack the acrylic plastic. I eventually determined that the solvent in the packing tape glue had softened the plastic which then displaced the glue. I'll eventually patch it back together and buff it smooth, but the solvent action of the adhesive was rather a surprise. I can only imagine what packing tape will do to a plastic film coated LCD screen. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
On Sun, 16 Aug 2015 17:26:25 -0700, the renowned Jeff Liebermann
<jeffl@cruzio.com> wrote:

> I can only >imagine what packing tape will do to a plastic film coated LCD screen.
They use a static clingy (soft) polyethylene film for keeping abrasion marks off the screens in shipping. No adhesive at all, I believe. The ultra-clear Staples packing tape (they seem to have changed suppliers it may not be currently available) has kind of a pleasant fruity smell. Probably some cocktail of carcinogenic chemicals. --sp -- Best regards, Spehro Pefhany Amazon link for AoE 3rd Edition: http://tinyurl.com/ntrpwu8 Microchip link for 2015 Masters in Phoenix: http://tinyurl.com/l7g2k48
>fruity
Ethyl acetate smells like that, and is pretty benign. Cheers Phil Hobbs
On Sun, 16 Aug 2015 18:24:00 -0700 (PDT), Phil Hobbs
<pcdhobbs@gmail.com> wrote:

>>fruity > >Ethyl acetate smells like that, and is pretty benign. > >Cheers > >Phil Hobbs
Methyl ethyl ketone smells like banana oil ;-) ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.