this is a 3d printed prototype of a
bottle that I designed
it's an SLA part it's one millimeter
thick and this is what you get from a
major North American Service Bureau it's
translucent at best I'm gonna show you
how to make it transparent so that you
can read through it don't forget to
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@botzendesign I always post stuff there
long before it gets to YouTube here my
name is Eric Strebel I'm an industrial
designer welcome to my channel about
product design and making I hope that
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making merchants just below the video on
the shelf t-shirts hoodies stickers
leggings and phone cases so when the
FedEx guy or the UPS guy drops this off
I often I only have a little bit of time
so normally I'm making FDM prints like
this and I'm showing my clients but
sometimes they want to actually see what
a clear bottle looks like cuz they're
gonna blow mold this thing and they want
to see what a clear bottle that I
designed looks like before they spend
all their money so I don't have a lot of
time sometimes literally a couple hours
often and I got to make this part look
better it looks like shit you know it's
got scratch marks all over I don't know
how this passes quality control it's
stratasys I mean come on this is
terrible
so the best I can do sometimes is just
clear coat the part with a little bit of
dupli-color clear in a can you know and
get something sort of halfway decent so
I could take it to my clients so they
don't fall on the floor and go what what
is this Eric this is what you get when
it dries it's okay you can kind of see
through it it looks halfway decent
it's representational of a clear bottle
it's average I'm gonna show you how you
can make it so it's transparent and you
can actually see
before we do that I need to talk to the
haters out there that keep living me
thumbs down on my videos I make damn
good videos and I always want to make
the best possible video that I can if
you're leaving me a thumbs down that's
bullshit man up let me know why you
don't like the video or don't leave a
thumbs down don't be a pansy I want to
make the best video I possibly can so
you're gonna thumbs down my video you
better damn well leave a freaking
comment and man up and let me know why
what don't give me a thumbs down I love
all you guys livin me thumbs up though
keep up the good work I really
appreciate that thanks so sometimes
these bottles they come with a scratch
mark on the inside and I gotta fix that
so you need a little sanding stick fix
that on the inside
and of course wet sanding on the outside
as well we're gonna first wet sand this
bottle to 320 grit and here I got a
couple sample bottles after 320 we're
gonna go to the next step we're going to
go to 400 we're gonna wet sand that and
they're gonna have a halfway decent
finish now this was this kind of super
quick turnaround it didn't have a lot of
time a little bit of a test using some
new materials and stuff so they don't
have the greatest finish on the outside
and only average finish on the inside
and the only reason I would be sanding
these things on the inside is if we're
gonna clearcoat
on the inside as well otherwise I would
leave that alone and not scratch it up
because that's really not gonna help my
cause so this is what the part looks
like 400 grit wet sanded on the outside
and cleaned up on the inside yeah that's
right wear the appropriate safety gear
I'm using a two-part automotive refinish
clear coat here the mixture is four
parts to one
it is urethane it smells you can get in
your eyes cause I irritation where the
appropriate safety gear
all right we'll mix this stuff up and
we're gonna spray it out onto those
bottles before we spray it out we're
gonna pour some on the inside we're
going to coat this bottle so coating it
on the bottle is going to smooth out the
inside basically so you can't see very
much here because it's coated on the
inside and the outside obviously as a
400 grit finish the proof will be in the
pudding of course when we spray the
outside here so it doesn't look like
very much at the moment but I poured
that stuff in and then I pour the rest
of the stuff into the gun and we're
going to coat the outside I'm using some
cardboard tubes here just so I can hold
the bottle without getting urethane all
over my hands just using an HVLP gun
here doing a couple two light coats on
this bottle and you can see as that
clear goes on the part starts to become
very transparent it doesn't look really
great
right now when you spray it out clear
has to flow out a little bit and that's
just the first coat alrighty so let's
compare the two that's a pretty dramatic
improvement you can clearly see through
the bottle so that looks clear to me
and now I'm dealing with the clear coat
that's on the inside
of this bottle and what I'm doing here
is I'm trying to get it to drip down
nice and even everywhere on the inside
of the bottle so this takes a little bit
of effort a little bit of patience a
little bit of time so that we don't get
any runs or sags on the inside of the
clear coat not the normal way you apply
clear coat onto a product but in this
case takes a little work this is the
part after it's been sprayed it's not
dry yet
it still has a little bit of texture but
here it is all dry and you can clearly
see through it you can even see some of
the little support materials on the
inside this is another project here
where there's about 16 of these bottles
yeah this is a couple grand worth of
parts right here boys and girls I'm
gonna take this one and do something a
little bit nicer and then we did on the
first one and
kind of show you the differences of
spending some extra time now this bottle
right here has been clear coated on the
outside so finished a 400 grit on the
outside for whatever reason when
Stratasys made these bottles since they
costed a whole bunch of money and they
were making a whole bunch of them I kind
of bitched about the other ones not
being such great quality they are
printed and there are a lot nicer I'm
not sure what they changed in their
process but in those bottles that they
sent me where I spent a whole bunch of
money on they really took their time
there were no scratches on the inside of
those like they were on the other ones
and they came out really nice so that
one has been clear coated on the outside
after the wet sanding and I'm gonna pour
some clear on the inside and this bottle
turns out a lot lot nicer than the other
ones just because I don't know maybe a
different process somehow there or
whatever but sort of the luck of the
draw I guess I'm not really sure
but I do put in a fair amount of clear
on the inside here and you can see
all the surfaces on the inside to make
sure that they are coated very nice of
course I could touch the outside of the
bottle here because that's already been
clear coated and I'm taking my time
making sure there's no air bubbles or
anything and then here I'm rolling the
clear coat into the neck area making
sure that I get everything coated really
nice and so we don't have any issues so
once I'm happy with the inside and it's
clear coated really nice I'm gonna dump
out the excess clear coat back into the
container and we'll put the cardboard
tube on it here now luckily I have two
of these bottles so we can compare
directly one to the other
this one the quality is much much better
you can see it's
bordering on an actual plastic or molded
part it looks pretty nice there's a
quick flyby of the part drawing pretty
happy with that now check out the part
on the left here there's a little hazing
at the top it came that way from the
factory don't know what that is I
couldn't get it out but this part here
is the part that we just clear coated on
the inside it looks very very nice when
you compare that to the one with no
clear on the inside and then the one on
the far left is the way it's gonna come
from the factory clear and the
translucent this is a huge improvement
so you can see almost kind of make out
the basics of my business card where
it's just clear coat on the outside and
with the clear on the inside and the
outside you can read the text of my
business card
super happy with that part let's add a
little bit of water because ultimately
these bottles holds a material and my
client wants to see what they look like
with liquid on the inside of them and so
they want to see that and you can see
the one on the left clear coat only on
the outside the one on the right there
clear coat inside and out a little bit
better simulation of what an actual blow
molded bottle will look like so if you
or your company have bottles that need
to be designed I can take care of that
from design to production data and the
prototypes as well don't forget to
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