For Every Airbrush Artist!

Ready to get involved? Register for free and you won't see any google advertising!

Register

Overspray on my dots?

Discussion in 'How to Control an Airbrush' started by John Michael Streithorst, Feb 22, 2016.


  1. John Michael Streithorst

    John Michael Streithorst Young Tutorling

    Joined:
    Sep 10, 2014
    Messages:
    13
    Likes Received:
    7
    Trophy Points:
    1
    okay,

    I am using Golden Fluid opaque black diluted 1:1 with golden's own thinner. Iwata HP-CS 0.3 needle and preassures from 25 to 15 psi. Distance was about 10 cm.

    Got lots of overspray. Any thoughts?

    20160222_003706699_iOS.jpg 20160222_003614955_iOS.jpg
  2. jagardn

    jagardn Airbrush Acquisition Disorder Patient Elite Member!

    Joined:
    Jan 4, 2013
    Messages:
    3,017
    Likes Received:
    2,447
    Trophy Points:
    126
    Location:
    Sarasota FL
    Still too thick. Reduce more. I generally start using Createx Illustration at 5:1 or more and it's a lot thinner than Golden Fluid.
  3. musicmacd

    musicmacd Air-Valve Autobot! Very Likeable!

    Joined:
    May 29, 2015
    Messages:
    4,668
    Likes Received:
    7,254
    Trophy Points:
    126
    Location:
    Brisbane
    At 10cm the spray will be large, this is normal and something you need to account for when painting
    Last edited: Feb 22, 2016
  4. John Michael Streithorst

    John Michael Streithorst Young Tutorling

    Joined:
    Sep 10, 2014
    Messages:
    13
    Likes Received:
    7
    Trophy Points:
    1
    5:1?! OK, will try that. Any thoughts on air pressure?
  5. JackEb

    JackEb Dragon Hunter Staff Member Admin

    Joined:
    Apr 21, 2012
    Messages:
    5,873
    Likes Received:
    4,995
    Trophy Points:
    126
    Location:
    Adelaide, Australia
    This is how I think of it......

    the lower you set the psi the greater you have to reduce, but it means less overspray (good for the painting and your lungs)

    there are times I've seen some people go 1:20 (paint:reducer) and 10psi when doing fine detail. it just means more passes to get the colour intensities you are after.

    reduction ratios will vary depending on the brand /type of paint you are using, needle size being used, current air temp and humidity you are experiencing.

    unfortunately no magic recipe.
  6. John Michael Streithorst

    John Michael Streithorst Young Tutorling

    Joined:
    Sep 10, 2014
    Messages:
    13
    Likes Received:
    7
    Trophy Points:
    1
    Thanks to all! This is very helpfull. Will set my pressure to 15 psi and increase reduction from 4:1 and up.
  7. markjthomson

    markjthomson Very happy! Staff Member Mod

    Joined:
    Jul 16, 2014
    Messages:
    5,649
    Likes Received:
    4,608
    Trophy Points:
    126
    Location:
    Auckland New Zealand
    The further away from the paper you get the greater the dot size and the more obvious the over spray. For the set up you're using that looks pretty normal.
  8. AndreZA

    AndreZA Elite Member! Elite Member! Artist of the Month!

    Joined:
    Feb 28, 2012
    Messages:
    5,156
    Likes Received:
    4,982
    Trophy Points:
    126
    Location:
    Johannesburg, South Africa
    That's not overspray, it's just the paint that is too thick as what's been mentioned. Even with thinner paint the spray pattern will still be that size but much smoother. Everything not directly under the tip is overspray. You need to learn to control with either the direction you are shooting or with distance or by blocking it out with shields or masks.
  9. John Michael Streithorst

    John Michael Streithorst Young Tutorling

    Joined:
    Sep 10, 2014
    Messages:
    13
    Likes Received:
    7
    Trophy Points:
    1
    Thank you AndreZA. That makes sense and is consistent with what I observed. I reduced the paint to 5:1 and the spray patern is the same, but as you said, smoother.

    Once again, thanks to all of you. This has been very helpfull.
  10. haasje dutchairbrush

    haasje dutchairbrush Air-Valve Autobot! Very Likeable!

    Joined:
    Oct 17, 2013
    Messages:
    2,861
    Likes Received:
    5,275
    Trophy Points:
    126
    Location:
    Netherlands
    Overspray is a widely used term but most often it's in regard to paint going where it isn't wanted. I'm not sure how you are using the term overspray here, but if it's in regard to the width of the dot that it's just the spray pattern of your airbrush. Going closer and playing around with the airpressure can make it larger or smaller but other than that it's just wat your brush does (and what makes it possible to make those nice fades)

    The spray patter itself isn't "realy nice" though (very "spickly"). It should give a smooth transition from dark to light. This is probably down to a combination of reduction (paint too thick or losing viscosity) and airpressure. getting a hold of that is part of the learning process I'm afraid.

    The following might be interesting: http://www.airbrushforum.org/threads/transparants-opaques-reducing-and-viscosity.12903/
  11. John Michael Streithorst

    John Michael Streithorst Young Tutorling

    Joined:
    Sep 10, 2014
    Messages:
    13
    Likes Received:
    7
    Trophy Points:
    1
    That was very usefullDutchairbrush, thank you.

    By overspray I meant the small paint "points" outside the Dot itself. I would imagine that the effect that I am getting would make a shade around the dot itself...

Share This Page