NEEDLING DEPTH UTOPIA
I've been needling in utopia for a year - & suspect many here do the same...
A BRIEF HISTORY OF TIME
1. purchased A6, set @2mm, few blood spots, thought I'm needling @2mm... WRONG!
2. purchased D2, set @2mm, few blood spots, thought I'm needling @2mm... WRONG!
3. used D2 @HI-Speed @2mm CORRECTLY (see below) and... blood ran in rivers down my forehead!
WHAT WAS WRONG?
To avoid (long) hair tangling, I was running D2 only in the hair direction,
LIFTING D2 after each stroke to start a new stroke in the same direction... WRONG!
HOW D2 WORKS
D2 starts shallow, measures stroke and progressively increases depth to the preset.
In other words: the 1st few seconds you needle shallower than you set.
In yet other words: if you lift after each stroke, you needle shallower all the time!
And this is exactly what I was doing - and suspect many others w/ long hair do the same...
WHAT IS RIGHT?
To needle at set depth, you MUST NOT LIFT D2 - for as long as possible that is...
The manual recommends "...moving in a moderate circular motion, do overlapping spirals with a couple cm (1 inch) diameter..."
https://www.derminator.com/Derminator-instructions.pdf
But I suspect this technique is for hair-less skin (e.g. face) cause it quickly tangles hair...
What I find an acceptable compromise is using the D2 in back-forth lawn-mower style in various directions:
View attachment 144193
This tangles hair, but not impossibly so -
and produces much, MUCH nastier results than the same settings with lifting action:
after 20min @1mm HI-Speed, ny temples are completely covered w/ blood,
after rinsing, a pink liquid oozes everywhere / flows down my forehead,
and next day my temples are covered with crust from this pink liquid...
ABOUT A6 / DR.PEN
I have owned both the A6 and D2 (below is my mini-review)
https://www.hairlosstalk.com/intera...-studies-and-such.119653/page-13#post-1777669
I'm almost 100% certain that A6 DOES NOT ACHIEVE SET DEPTH:
the D2 bleeding @2mm was INSANE @30Hz - if the the A6 achieved 2mm @100Hz, it would needle my brains off! But instead it just produced a few blood specks...
A6 DOES achieve depth idle (I've measured) - so what's up?
Skin friction slows the needles / reduces depth.
While the D2 magnet operates as a self-correcting Hammer,
hitting harder and harder till the set depth is achieved,
Dr.Pens (and similar) are mere oscillation devices -
they oscillate a weight w/ needles on a spring:
View attachment 144194
When you put a damper in their way (your skin),
the oscillation amplitude - and therefore needling depth - decreases:
View attachment 144195
Since their depth is set mechanically, they have no feedback-loop to rectify depth like the all-electronic D2 and I'm thus fairly confident that Dr.Pen type devices do NOT achieve set depth.
FINAL QUESTION
Does any D2 user achieve the Follica 1600 hits/cm2 @1mm with the above "correct depth" procedure?
@400 hits/cm2, my temples are covered with blood, and next day with crust -
can't imagine doing another 3 such sessions on top all the way to 1600...