Reddit mentions: The best lab funnels

Thanks for the gold!

Just for that, here's a more detailed, complete list of what is needed to micron filter smaller amounts (1l solution), with links to the cheapest good option on amazon:

Vacuum flask - http://amzn.com/B005QDP1XC - This is just a flask with a tap for a line from a vacuum source.

Hand vacuum pump - http://amzn.com/B00657XV4O - This creates a vacuum, also is handy (lol!) when finishing extracts. Just take the tube from the end and stick it on the male port on the side of the vacuum flask. If you already have a brake caliper vacuum pump or electric pump those can be subbed for this.

Buchner funnel - http://amzn.com/B00BHLE6MO - a funnel, with a space for filter paper

Rubber collar - http://amzn.com/B0018S0WBK - forms a seal between the buchner funnel and the flask. Wet your finger and around both sides of the collar, place the collar on the flask, and the funnel on the collar, and firmly press them together. This will ensure a good seal.

Medium flow rate filter paper - http://amzn.com/B00YM3R7KW - and slow filter rate filter paper - http://amzn.com/B006T5AY24 - Medium is good enough for most, and takes less time to filter, but the slow will yield the highest quality. The slow filter paper link has multiple options, be sure to select "1.5 micrometer pore, 11cm diameter" to get the right size/type.

Once it's all assembled, just pour the extract/herb solution (slowly) into the funnel, while pumping away at the vacuum pump. The vacuum will keep things flowing and you'll be done sooner than if you just let it drip through a coffee filter.

Bonus tek - to make a vacuum chamber to polish your extract:

Take a small mason jar and make a hole in the lid, big enough for the tubing from the hand pump. Take a bit of that tubing, or similar from home depot etc, and hot glue it so that it goes through the lid and into the mason jar. Really lay on the hot glue until its gobbed up all around the hole, sealing it well. Let it cool. You can now place your extract on a small bit of parchment, place it in the jar, seal the lid, and hook the pump up to the tubing. When you pump and create a vacuum (as high as this model will go, just keep pumping until the gauge registers no change), microbubbles of solvent and air will foam up to the surface, smoothening and polishing your extract. Its not a necessity like it is with BHO etc, but it's still nice to do. I even do it to some of my rosin batches as it can help them budder up.

Hey, I'm a chemist. The reason for the conical shape is because the point of a separation funnel is to separate two layers of material. So you're interested in stopping flow right at the interface between the layers, so you want the bottom to be narrow so you can to minimize error.

Another type of funnel with a stopcock is an addition funnel, which lacks these separation-optimized features but frequently provides a means to cycle atmosphere between the vessels above and below to ensure a perfectly continuous flow. This is particularly helpful if you wish to control the atmosphere (for example, to brew under nitrogen or argon).

That said, chemistry glassware is generally far more expensive than its value to anyone who is not deadly serious about certain outcomes. If your drip can stand to sputter for a second, you don't need a $200 addition funnel. If you've got the $200 and want to prove that sputter-free coffee brewed under xenon is the wave of the future, be my guest.

Do you have access to a pressure cooker? A pressure-cooker will prevent boiling and a lot of agitation which will allow the fat to rise to the top of the broth as it cooks. If you give this a shot make sure that you allow the pressure-cooker to depressurize naturally and fully; if you open the lid before then the liquid may instantly boil. Ladle out the broth into a deep but narrow container and chill. When it has gelled cut the top layer off (there is likely a bit of fat there). If you really want to get fancy you could order a separatory funnel like this one on Amazon but that may be further than you need to go :) I would seriously be surprised if any shops are using a funnel like that, but hey if it's just for fun why not? That's what a chemist would do!

I go to local hardware shops but i dont think i can find 400 or close mesh filter. it is a long shot but i will try anyway.

in the other hand i find a idea. i just fill all coffee to aeropress body.
i suppose it can easily collect 2 - 3 oz coffee, and my valve drip above them.
it will look like this

Top part: https://www.amazon.com/American-Educational-Separatory-Stopcock-Capacity/dp/B00657UDOU/ref=sr_1_11?s=industrial&ie=UTF8&qid=1493564501&sr=1-11&keywords=separatory+funnel

2. part aeropress body with metal filter

3. part is hario server or s.thing similar

what do you think about that? Can it work as well as cold bruer ?

Got it from Amazon - here is a link to it if you're interested.

Tested it this morning and I'll admit that it is small (100ml capacity) but worked really well overall - I did 3 passes with water over my coffee grounds and the cup of coffee was great.

Those.... don't look like powder funnels. The "drip tip" is the red flag; none of those are going to have particularly wide stems and the long stem is just going to get clogged with powder.

If you're on a budget I'd look for a plastic funnel with a stem OD <24 mm like this one or this one. If you're willing to fork over a little more cash and get a glass one there are nice 24/40 joint funnels like this small one or this huge one.

What I do is use a funnel, and carefully pour it into a 4oz bottle. Easy.

Also, try measuring by weight. That's pretty easy too.

So I started with the Yama, but thought it would be a fun project to try to make something from scratch. Had to turn to chem glassware, which is a little pricey but I think looks cool. I used a separatory funnel, Buchner funnel, and Florence flask.

Glassware ended up costing about $83, and I used the ring stand we had in the science lab at school.

Chemistry Hippie | 25 Micron Screens 6-pack | Essential Oil Concentrate Filter | 5x5 Inch Sheets https://www.amazon.com/dp/B018V49HFA/ref=cm_sw_r_cp_api_5cAExbCJ8AC3K

Eisco Labs Polypropylene Buchner Funnel, 13cm, Designed for 11cm Filter Paper https://www.amazon.com/dp/B00BHLE6MO/ref=cm_sw_r_cp_api_agAExb2YAPW8P

^^ a funnel like that? Then I use filters? Right now it's sitting in a glass container in the freezer, hopefully I used the right ratio of everclear to wax, lol.

What do you mean clogged filters? Were the Buchner funnels included with glass frits? There are ones without frits that can take filter paper. Here's the one I ordered: https://www.amazon.com/Deschem-350ml-Glass-Buchner-Funnel/dp/B0774CPXTL (downside is the long shipping time)

There are plenty of filter papers available. Whatman brand pops up a lot. I'll start with cutting up coffee filters.

What problem did you have with sealing them? I'm assuming the ground glass takes care of the funnel to flask connection. Maybe the filter seal at the bottom was the issue? Lots of learning to do.

Good to hear it made stunning coffee!

• [I personally think this is your best option] (http://coffeegeek.com/images/58036/aeropress-cold-brew-tower.jpg)
  
  
• Here, they call it both a water ball and a water bowl as well as some interesting translation choices.
  
  
• [Here's a reddit thread on the topic so you can just make your own] (http://www.reddit.com/r/DIY/comments/1eut17/looking_to_make_a_cold_brew_drip_coffee_maker/)
  
  If chemistry is your thing /u/thegreatbrendini suggests:
  >Here you go, I'm not positive about the size of the filter you're going to need/want. I would imagine 150 mL would be good but you could go bigger or smaller depending on what you want. The bigger you go the buchner funnels get expensive fast.
  
  >Top Part:http://www.amazon.com/American-Educational-Conical-Separatory-Capacity/dp/B006580L96/ref=sr_1_3?ie=UTF8&qid=1369273329&sr=8-3&keywords=separatory+funnel
  
  >Middle: http://www.amazon.com/Chemglass-CG-1402-18-Filtering-Capacity-Diameter/dp/B005WX2RQU/ref=sr_1_3?ie=UTF8&qid=1369273592&sr=8-3&keywords=fritted+buchner+coarse
  
  >Bottom
  http://www.amazon.com/PYREX-500mL-Narrow-Erlenmeyer-Flasks/dp/B004XR5V6E/ref=sr_1_6?ie=UTF8&qid=1369273642&sr=8-6&keywords=erlenmeyer+flask
  
  edit formatting
  
  

I came across a coffee shop in Tel Aviv called Cafelix that used chemistry equipment and a chemex to make their cold brew. It worked pretty well.

Here's a link to a separator similar to the one they bought:
http://www.amazon.com/Separatory-Funnel-PTFE-Stopcock-500ml/dp/B003QJRS20

I bought one like this and will be experimenting soon!

here's 2000ML funnel I just found on amazon:
http://www.amazon.com/Separatory-Funnel-Conical-Shape-2000/dp/B001A32EUK/ref=sr_1_1?ie=UTF8&qid=1369232469&sr=8-1&keywords=separatory+funnel+2000ml

a bit pricey, but the higher in volume you get, the more expensive..

Also, try posting to /r/Coffee, you're sure to get loads of advice and help

Here you go, I'm not positive about the size of the filter you're going to need/want. I would imagine 150 mL would be good but you could go bigger or smaller depending on what you want. The bigger you go the buchner funnels get expensive fast.

Top Part:

http://www.amazon.com/American-Educational-Conical-Separatory-Capacity/dp/B006580L96/ref=sr_1_3?ie=UTF8&qid=1369273329&sr=8-3&keywords=separatory+funnel

Middle:
http://www.amazon.com/Chemglass-CG-1402-18-Filtering-Capacity-Diameter/dp/B005WX2RQU/ref=sr_1_3?ie=UTF8&qid=1369273592&sr=8-3&keywords=fritted+buchner+coarse

Bottom

http://www.amazon.com/PYREX-500mL-Narrow-Erlenmeyer-Flasks/dp/B004XR5V6E/ref=sr_1_6?ie=UTF8&qid=1369273642&sr=8-6&keywords=erlenmeyer+flask

A glass funnel like this to hold the paper

http://www.amazon.com/Funnel-Short-stem-Glass-100/dp/B0017U6H36/ref=sr_1_5?ie=UTF8&qid=1394639219&sr=8-5&keywords=glass+funnel

plus a vacuum flask

http://www.amazon.com/American-Educational-Clear-Borosilicate-Filtering/dp/B005QDPKU6/ref=sr_1_4?ie=UTF8&qid=1394639307&sr=8-4&keywords=vacuum+flask

or a 2-Neck flask

http://www.amazon.com/Chemglass-CG-1520-14-1000mL-Boiling-Standard/dp/B005WX3K02/ref=sr_1_1?ie=UTF8&qid=1394639522&sr=8-1&keywords=2-neck+flask

to hold the coffee and let the displaced air escape. It wouldn't work as nicely as a chemex but if you like the look of labware in your kitchen go for it.

Note: I didn't take the time to find the right size funnel and you would want a bored rubber/cork stopper to put on the funnel.

Well I didn't intend to use it strictly as a powder funnel if at all, so my question remains, what size would the the most similar to this one, mentioned previously?

do you have a manifold you could use? I hook up 8 flasks at a time to one vac, or two 30gal bel-art funnels to a single vac. How much material are you running through?

Edit: https://www.amazon.com/Scienceware-Polyethylene-Buchner-Table-Top-Porosity/dp/B002VA5SXQ?th=1

Dropper Bottles:
https://www.amazon.com/gp/product/B00V2C0C7Q/ref=oh_aui_detailpage_o06_s01?ie=UTF8&psc=1


If you want dropper bottles that are closer to what Vallejo uses...use these guys (you're going to be paying a premium though, so shop around): https://www.megahobby.com/products/17ml-dropper-bottle-10-pk-vallejo.html


Funnels:
https://www.amazon.com/Teenitor-Wholesale-Plastic-Chemical-Essential/dp/B01G82SKNM/ref=pd_sim_121_3?_encoding=UTF8&pd_rd_i=B01G82SKNM&pd_rd_r=TTG8P8TEMEX8EKXYE9E9&pd_rd_w=za2LA&pd_rd_wg=vBjk3&psc=1&refRID=TTG8P8TEMEX8EKXYE9E9


Agitators:
https://www.amazon.com/BRCbeads-Gemstone-Polished-Crystal-Healing/dp/B00VNLWM4W/ref=sr_1_sc_1?s=arts-crafts&ie=UTF8&qid=1501787928&sr=1-1-spell&keywords=lavastone+beads

Here is an amazon link to roughly the same setup, many exist (sorry for link format":

http://www.amazon.com/Separatory-Funnel-PTFE-Stopcock-500ml/dp/B003QJRS20/ref=sr_1_16?s=industrial&ie=UTF8&qid=1374109784&sr=1-16

It's basically these four items, seperator funnel, glass funnel, erlenmeyer flask, and a stand. Although I don't know exactly what stand they're using in this particular setup (whether it was purchased in a set (although it does look awfully familiar)), it's not too difficult to reproduce.

You don't actually need a dark room, it's a common misconception. You only need that if you plan to use an enlarger and make your own prints. I don't, but only due to lack of space in my apartment - I scan them in and order prints at Costco or Bartells like any normal digital scan.

If you get one of the Paterson Reel tanks like I have in that photo, you just need a changing bag. Put your 1-2 rolls of film, a bottle opener, a pair of scissors, and all the tank pieces in the bag. Seal it up, pop open the film canister with the bottle opener, then spool the film onto the reels. Put both reels back in the tank and seal it up. Everything else can be done in daylight. (you can skip the bag and do this in a pitch black room like your bathroom or a closet if you want. I prefer the bag- I can sit on the couch and watch TV while I spool rolls).

Then you're just dumping in chemicals on a timed schedule and then unspooling and hanging them to dry when complete. B&W is roughly 13 minutes a batch at diluted 1+1, or 6 minutes at stock (full strength) solution. Stock just uses it up twice as fast, but saves time.

B&W = developer (12-15 minutes for most films at 1+1 - check the massive dev chart -> stop bath (1 minute) -> fixer (1 minute) -> rinse (2-3 minutes) -> hang to dry (2ish hours or until totally dry).

Color = developer (6ish minutes) -> blix (2-3 minutes) -> rinse (2-3 minutes) -> stabilizer (1 minute) -> hang to dry (2ish hours).

I'm pulling those numbers from memory, but the unicolor kit has a good guide with it.

Stuff you need

• D-76 developer (black and white)
  
• Stop bath (black and white)
  
• Fixer (black and white)
  
• C-41 developer kit (color)
  
• Changing bag
  
• 500ml beaker (at least 1, up to 3 for convenience)
  
• 1L beaker (at least 1, up to 3 for convenience)
  
• .5L plastic bottles (At least 6)
  
• Scissors
  
• Bottle opener
  
• Funnel (optional, if you have steady pouring hands)
  
• Paterson Reel tank
  
• Glass thermometer (optional for B&W, necessary for color)
  
• Clothespins/some string or paracord to hang film to dry
  
• A bucket (5G or so- small cleaning bucket - Color only)
  
  For B&W film - you use the 1+1 developer one time (150ml per roll of film) and dump it when you finish. Which means that 1L D-76 pouch gives you 6 rolls of film. I buy mine in the 1G bags to mix up as they're cheaper, but you need a 1G plastic bottle to store it. For color film that kit does 8-9 rolls of film. The bigger 1G kits are more expensive and you can also buy the chemicals separately. Color is picky because you need to keep it at a constant 103F the whole time or risk ruining them, hence the bucket (or a bathtub). Color developer and all other chemicals you dump back into bottles and re-use until it's used up.
  
  The color film process is actually really well documented in the booklet that comes with the unicolor kit.
  
  If you ever want a hands on trial, I can do a video of the process or a demo at my apartment (my fiance thinks it looks like I'm doing crazy mad science stuff every time)
  
  Check out /r/analog for weekly advice threads or some of these helpful links:
  
  
• Color development
  
• B&W development
  
• Massive Dev chart for B&W

I use a 25ml glass pipette with bulb and a separatory funnel. You don't have to use a separatory funnel but it really speeds up the process.

https://www.amazon.com/Volumetric-Pipette-Serological-Dropping-Pipettes/dp/B07YZCQ1FH/ref=mp_s_a_1_21
(These are 20ml, these work too)

https://www.amazon.com/dp/B07XKXHCR7/ref=cm_sw_r_cp_awdb_t1_x1A1DbG9DM1NQ

https://www.amazon.com/StonyLab-Borosilicate-1000ml-Separatory-Stopcock/dp/B0781BB3NM/ref=mp_s_a_1_3

https://www.amazon.com/StonyLab-Borosilicate-Buchner-Filtering-Funnel/dp/B0785ZKC4F?th=1&psc=1

$60 500 mL

That question has been asked a lot. Here's some research I collected 1 2 3. While expensive, if you are seriously considering getting a tower versus using a toddy, I would just bite the bullet and get the Yama tower.

Homebrew Materials:

Vacuum Pump Oil

Vacuum Tubing

1/4" Barb x 1/4" NPT Male Hose Fitting

1/4" Male x 1/4" Female NPT Extension Hose

Vacuum Pump

Filters

Spatulas

Magnetic Stir Bar

Digital Hotplate with Magnetic Stirrer

Nitrile Gloves (Better than Latex)

Empty Capsules (Buy Separated unless you hate your life)

Capsule Machine (If you value your sanity, buy more than a 100... I hated my life doing this)

Mohr Pipets

Pipette 10ml

Mortar and Pestle (If you're doing orals, get this... Otherwise, you're playing Russian Roulette with your doses and liver)

Funnel (For pouring into small places)

Alconox (For clean your shit)

Temperature Gun (How hot is my shit?)

Graduated Cylinder (If you measure with beakers, you're a fucking idiot... And you should consider Volumetric Flasks)

Beaker Set

1 Liter Beaker (Because brewing en'masse is better)

Scale (I have a 2kg one, too)

Calibration Weight Set

Calibration Weight 100g (Because you need two for the scale linked)

Vacuum Regulator (Unless you want to filter 9001 times due to broken shit)

Oil (Any USP grade, filtered or unfitlered)

BB

BA

Butyl Stoppers

Flip Top Seals

Crimper

Vials (Unsealed)

Autoclave (Cheaper than an oven, why are you using an oven?!)

Weight Boats (Buy a million of these. They're cheap and useful)

Did I miss something? Probably. Yes.