How do TV productions get such visible beams of light from some of their
effects lights?

How do TV productions get such visible beams of light from some of their
effects lights?

I suspect they don't, and it's all "virtual" graphics.
--

Graham.
%Profound_observation%

DerbyBorn Wrote in message:
How do TV productions get such visible beams of light from some of their
effects lights?


Varilights & CO2?
--
Jim K


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In article 2,
DerbyBorn wrote:
How do TV productions get such visible beams of light from some of their
effects lights?

You only see the beams when thenreis smoke or fog in the air,. It the
theatre it said that the use of smoke shows the lack of imagination of the
director.

--
from KT24 in Surrey, England

In the old days for those laser effects devices to see the beams they just
used good old dry Ice machines.

I wonder if anyone has made a replacement for ice yet?

Brian

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"charles" wrote in message
...
In article 2,
DerbyBorn wrote:
How do TV productions get such visible beams of light from some of their
effects lights?

You only see the beams when thenreis smoke or fog in the air,. It the
theatre it said that the use of smoke shows the lack of imagination of the
director.

--
from KT24 in Surrey, England

In article , Brian Gaff
wrote:
In the old days for those laser effects devices to see the beams they
just used good old dry Ice machines.#

Dry ice only gives low smoke - it hugs the ground.

I wonder if anyone has made a replacement for ice yet?

yes, they rely on ordinary ice to chill the smoke.

--
from KT24 in Surrey, England

On Mon, 15 Jan 2018 09:53:27 +0000 (GMT), charles wrote:

In the old days for those laser effects devices to see the beams
they
just used good old dry Ice machines.#

Dry ice only gives low smoke - it hugs the ground.

And the "smoke" is condensed steam, ie water and quickly makes the
floor wet and slippy.

A Dry Ice Machine is a basically a big tank of water and big heater,
you heat the water to quite hot (FSVO "quite hot"). There is a metal
basket above the water that you fill with dry ice and when you want
the floor hugging smoke you lower the basket into the hot water.

I wonder if anyone has made a replacement for ice yet?

yes, they rely on ordinary ice to chill the smoke.

--
Cheers
Dave.

On Mon, 15 Jan 2018 11:16:17 +0000, Dave Liquorice wrote:

A Dry Ice Machine is a basically a big tank of water and big heater, you
heat the water to quite hot (FSVO "quite hot"). There is a metal basket
above the water that you fill with dry ice and when you want the floor
hugging smoke you lower the basket into the hot water.

That reminds me of a hilarious event when I worked for ATV in vision
control (aka 'racks') at Wood Green Empire, our TV theatre/studio. This
was pre-video tape days so everything was live. We did a play on
Wednesdays in the H M Tennant Globe Productions series - quite heavy stuff
for ITV, like Checkov (?) and Ibsen. I forget which play this was but in
one scene there was a couple seated at a table with a cup of tea between
them. The tea was supposed to be hot so the props guy put a little knob
of dry ice in it to make it steam. It was fine on rehearsal but on
transmission he put too big a knob and the 'tea' could be seen on shot
'boiling'. It was a serious play and the actors were busting a gut trying
not to laugh.

--
TOJ.

On Sun, 14 Jan 2018 19:46:54 GMT, DerbyBorn wrote:

How do TV productions get such visible beams of light from some of their
effects lights?

By having diffused "smoke" in the air. There are various machines to
do this, for the effect you are describing you'd use a "hazer" this
just emits a gentle but steady stream of "smoke". Hidden round the
back of the set somewhere it'll build up a haze in a fairly large
enclosed space in about 1/2 an hour.

"smoke" this used to be vaporised mineral oil, ie squirt oil onto
something hot and blow the result out of the box. I think they now
use compressed air to atomise the oil. And there are water based
options.

--
Cheers
Dave.

On 15 Jan 2018 10:57:52 GMT, Huge wrote:

"smoke" this used to be vaporised mineral oil, ie squirt oil onto
something hot and blow the result out of the box. I think they now
use compressed air to atomise the oil. And there are water based
options.

I'm surprised they're allowed to use the oil based systems in places
where the public have access. You don't want to be breathing vapourised
oil for any length of time.

I think the systems use atomised oil now rather than vaporised. Even
the water based systems have some oil but they tend not to produce
quite the same effect, larger particle sizes?

--
Cheers
Dave.

Huge wrote:

On 2018-01-15, Dave Liquorice wrote:
On 15 Jan 2018 10:57:52 GMT, Huge wrote:

"smoke" this used to be vaporised mineral oil, ie squirt oil onto
something hot and blow the result out of the box. I think they now
use compressed air to atomise the oil. And there are water based
options.

I'm surprised they're allowed to use the oil based systems in places
where the public have access. You don't want to be breathing vapourised
oil for any length of time.

I think the systems use atomised oil now rather than vaporised.

You don't want to be breathing that, either!

(I once went on a course on the care and feeding of breathing air
compressors (for scuba diving) and some of it appears to have stuck!)

Yes. Paraffins (which are about the most unreactive carbon based oils
you can get) are remarkably bad for the lungs.

--

Roger Hayter

On 15 Jan 2018 10:57:52 GMT, Huge wrote:


"smoke" this used to be vaporised mineral oil, ie squirt oil onto
something hot and blow the result out of the box. I think they now
use compressed air to atomise the oil. And there are water based
options.

I'm surprised they're allowed to use the oil based systems in places
where the public have access. You don't want to be breathing vapourised
oil for any length of time. Or indeed, at all.

A point that seems to go past some of the airy fairy types who will
protest at, traffic fumes from vehicles delivering their food,
incinerators burning their rubbish and power stations making electric
to keep them warm.
But are quite happy to stink the house out with scented candles
containing oils to create the scent for an ambience to listen to
their whale sound CD while meditating on the Yoga mat.

G.Harman

wrote:

On 15 Jan 2018 10:57:52 GMT, Huge wrote:


"smoke" this used to be vaporised mineral oil, ie squirt oil onto
something hot and blow the result out of the box. I think they now
use compressed air to atomise the oil. And there are water based
options.

I'm surprised they're allowed to use the oil based systems in places
where the public have access. You don't want to be breathing vapourised
oil for any length of time. Or indeed, at all.

A point that seems to go past some of the airy fairy types who will
protest at, traffic fumes from vehicles delivering their food,
incinerators burning their rubbish and power stations making electric
to keep them warm.
But are quite happy to stink the house out with scented candles
containing oils to create the scent for an ambience to listen to
their whale sound CD while meditating on the Yoga mat.

G.Harman

Ah, but they're "natural"; like tobacco.

--

Roger Hayter

(Roger Hayter) Wrote in message:
wrote:

On 15 Jan 2018 10:57:52 GMT, Huge wrote:


"smoke" this used to be vaporised mineral oil, ie squirt oil onto
something hot and blow the result out of the box. I think they now
use compressed air to atomise the oil. And there are water based
options.

I'm surprised they're allowed to use the oil based systems in places
where the public have access. You don't want to be breathing vapourised
oil for any length of time. Or indeed, at all.

A point that seems to go past some of the airy fairy types who will
protest at, traffic fumes from vehicles delivering their food,
incinerators burning their rubbish and power stations making electric
to keep them warm.
But are quite happy to stink the house out with scented candles
containing oils to create the scent for an ambience to listen to
their whale sound CD while meditating on the Yoga mat.

G.Harman

Ah, but they're "natural"; like tobacco.


And asbestos.
--
Jim K


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http://usenet.sinaapp.com/

In message , Huge
writes
On 2018-01-15, Dave Liquorice wrote:
On Sun, 14 Jan 2018 19:46:54 GMT, DerbyBorn wrote:

How do TV productions get such visible beams of light from some of their
effects lights?

By having diffused "smoke" in the air. There are various machines to
do this, for the effect you are describing you'd use a "hazer" this
just emits a gentle but steady stream of "smoke". Hidden round the
back of the set somewhere it'll build up a haze in a fairly large
enclosed space in about 1/2 an hour.

"smoke" this used to be vaporised mineral oil, ie squirt oil onto
something hot and blow the result out of the box. I think they now
use compressed air to atomise the oil. And there are water based
options.

I'm surprised they're allowed to use the oil based systems in places
where the public have access. You don't want to be breathing vapourised
oil for any length of time. Or indeed, at all.

Hmm.. most production machinery with pneumatic cylinders used drip feed
lubrication in my day. Not just getting up your nose but dripping down
your neck off the rafters.
Of course things may have moved on in 35 years:-)


--
Tim Lamb

In message , Huge
writes
On 2018-01-15, Tim Lamb wrote:
I'm surprised they're allowed to use the oil based systems in places
where the public have access. You don't want to be breathing vapourised
oil for any length of time. Or indeed, at all.

Hmm.. most production machinery with pneumatic cylinders used drip feed
lubrication in my day. Not just getting up your nose but dripping down
your neck off the rafters.

Yes, but you aren't the public!

(I still remember the posters in the WD & HO Wills fitting shop from when
I worked there in vacations some 43 years ago, telling you not to put
oily rags in your pockets because of the danger of cancer of the
testicles!)

I was just wondering if there is an *asbestos/cigarette smoke* disease
hovering above all those production workers who faced it 8 hours a day.

--
Tim Lamb

Tim Lamb wrote:

In message , Huge
writes
On 2018-01-15, Tim Lamb wrote:
I'm surprised they're allowed to use the oil based systems in places
where the public have access. You don't want to be breathing vapourised
oil for any length of time. Or indeed, at all.

Hmm.. most production machinery with pneumatic cylinders used drip feed
lubrication in my day. Not just getting up your nose but dripping down
your neck off the rafters.

Yes, but you aren't the public!

(I still remember the posters in the WD & HO Wills fitting shop from when
I worked there in vacations some 43 years ago, telling you not to put
oily rags in your pockets because of the danger of cancer of the
testicles!)

I was just wondering if there is an *asbestos/cigarette smoke* disease
hovering above all those production workers who faced it 8 hours a day.

Doubt it. Scrotal cancer in chimney sweeps has been known for two
centuries at least. You probably have to get seriously oily all over
every day and not wash much for a few years.

--

Roger Hayter

In article ,
says...


I was just wondering if there is an *asbestos/cigarette smoke* disease
hovering above all those production workers who faced it 8 hours a day.

My father died from gastric ulcers when I was three and a
half.

About 10 years later I learn't, in a Geography lesson, that
gastric ulcers where a major cause of deaths in an area where
asbestos was mined.

My father's death certificate listed his occupation as:
Labourer (Asbestos Factory).

--

Terry

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Huge wrote:
On 2018-01-15, Dave Liquorice wrote:
On Sun, 14 Jan 2018 19:46:54 GMT, DerbyBorn wrote:

How do TV productions get such visible beams of light from some of their
effects lights?

By having diffused "smoke" in the air. There are various machines to
do this, for the effect you are describing you'd use a "hazer" this
just emits a gentle but steady stream of "smoke". Hidden round the
back of the set somewhere it'll build up a haze in a fairly large
enclosed space in about 1/2 an hour.

"smoke" this used to be vaporised mineral oil, ie squirt oil onto
something hot and blow the result out of the box. I think they now
use compressed air to atomise the oil. And there are water based
options.

I'm surprised they're allowed to use the oil based systems in places
where the public have access. You don't want to be breathing vapourised
oil for any length of time. Or indeed, at all.


Which is why theyre glycol based now, same as e-cigarettes. Despite
appearances, supposedly innocuous.

Tim

--
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