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Digger11
01-26-2016, 07:47 PM
Hi,

Just put a coat of Optimum Gloss Coat on my VW Golf and I put it on way too thin.
I followed the instructions on the container of a few drops per panel. I only used 2.5ml which probably nearly got all absorbed by the applicator anyway.

So the new plan is to apply drops per panel. I have split the car into 24 equal sized areas, but need to understand roughly how many drops per ml.
I have read both 20 and 60 drops per ml in my google searches.

So at 20 drops per ml and 7.5ml remaining, I would use 6 drops per section, but at 60 drops per ml, I would need to use 19 drops - quite a large difference.


Has anyone roughly counted how many drops they have applied to a small car, or how many drops per panel ?

Also, I have 10ml of Opticoat 2.0 that I have saved up for my new car, and assume that drops per ml is the same as Gloss Coat ?
Drops measured using the blue needle that comes with the Gloss Coat, they are very small

thanks

Digger

AZpolisher15
01-26-2016, 08:36 PM
There is a post about drops per mL. Can't seem to find it for ya, but I remember seeing it.

Digger11
01-26-2016, 08:40 PM
There is a post about drops per mL. Can't seem to find it for ya, but I remember seeing it.

Yes, i have read plenty that talk abour 20 drops per ml, but then read one from an Optimum employee that stated 60 drops per ml.
Quite a difference im sure you will agree

The Guz
01-26-2016, 09:19 PM
It's even easier to use the suede applicator. A nice bead down the center is all you need to spread the product around. Worked perfectly for me when I used Gloss Coat.

Mantilgh
01-26-2016, 10:06 PM
Chris Thomas said this in another thread.



Also, I just checked to see how many drops were in 5cc and it was over 300 drops using the blue dispensing tip that is included.

http://www.autogeekonline.net/forum/auto-detailing-101/97791-gloss-coat-how-many-cc-3.html#post1334986

AGOatemywallet
01-26-2016, 11:36 PM
So, are you trying to say that, "A few drops per panel", is NOT true.


OPT explaining that there are 60 drops per ml makes the above statement even less believable.


11 panels on a 4-Door sedan x 3 drops per = 33 drops or about .5ml

Should be able to do 20 cars with 10ml of Gloss Coat

Digger11
01-27-2016, 12:29 AM
AGO -It does appear that the couple of drops is a bit conservative. I did the math like you and am now fairly confused.

That said, I coated a W211 Mercedes with OptiCoat 2.0 when it first came out and the coating still works perfectly. There was plenty of speculation at the time that no coating could last for over 2 years - well my Merc is proof that this speculation was just that.
I have diligently saved 10ml of 2.0 for my new car that arrives mid year, but am trying Gloss Coat on my other cars.
I put the Opticoat 2.0 on so long ago, I just can't remember how thick to apply it.
I do love the 2.0 though, if Gloss coat is 1/2 as good I will still be pleased.

cheers
Digger

Digger11
01-27-2016, 05:11 AM
Further to my Gloss Coating. Got home tonight after coating yesterday and the Golf was lookng pretty shiny so i poured a bucket of water on the roof and hood and the water just slid off with the remaining little bit of water beading beautifully..
Looks amazingly like the 2.5ml has done something. No idea how long it will last though.

Digger11
01-27-2016, 05:15 AM
Also, i bought 10 x 1ml measuring vials on ebay (for $1.59) so i will do a drop count when they arrive.

tdekany
01-27-2016, 06:37 AM
Digger11 - you want to use around 8cc for that size car. Also don't pour water on the car. If you don't dry it you may get water spots. If you do dry the car without a cleaning/lubricating agent - you can mar the paint. 2.5 cc will not last as claimed. Way too thin. YouTube how to apply Opti coat and see how much those guys are using

swanicyouth
01-27-2016, 03:21 PM
Dunno anything specific about GC, but as a pharmacist, we always use 20 drops per ml when calculating days supply for billing eye drops and similar.

So, a 5ml bottle of Tobradex has 100 drops.

This will of course vary depending on exactly what liquid you are calculating and its viscosity I'm sure, however 20 drops per ml is a pretty safe bet for most aqueous like solutions.

AGOatemywallet
01-28-2016, 12:11 AM
The smaller tip of the OPT syringe is likely what increases the number of drops per cc

Swanic is correct that viscosity is also a variable, as is density of the liquid


I agree with Dekany, "a few drops per panel" is not realistic.

The guidance should probably be removed from OPT marketing materials to prevent under performance, caused by insufficient quantities applied.

FUNX650
01-28-2016, 09:44 AM
Fluids:

Before delving into the interdependency between
viscosity, flow-rate/(velocity), temperatures, etc...

Into which fluid 'category' befits these
two Optimum Coating products:
-Newtonian
-Non-Newtonian
-Both (at times)?


Bob

Mantilgh
01-28-2016, 10:35 AM
It really depends both on the fluid used and the dispenser.

I just did a little experiment with two different fluids, water and 90% alcohol, and using two different dispensers. One 3ml syringe and one needle tipped bottle dispenser.

1ml (1cc) in each.

Syringe ~ 20 drops water
Syringe ~ 40 drops alcohol
Needle tip ~ 40 drops water
Needle tip ~ 60 drops alcohol

zmcgovern45
01-28-2016, 10:40 AM
Why bother counting drops?

You should be able to see the coating on the surface as you're applying it.... and then it starts to flash away.
https://farm4.staticflickr.com/3936/15267791790_be1f203222_b.jpg
https://farm4.staticflickr.com/3930/15267879208_6213789faa_b.jpg
https://farm4.staticflickr.com/3933/15451341041_3362614394_b.jpg