Re: Advice please: Good outdoor surface for painting an analemmatic dial
I used a paint for concrete on asphalt for an analemmatic about 13 years ago. It held up for a few years at least, but then the school repaved the area. -Bill G. On Thu, May 2, 2013 at 3:37 PM, Tom Kreyche wrote: > Search on "Tennis Court Paint" and you will get all kinds of interesting > info...some advertise minimal surface prep and they are non-skid. Most > appear to be acrylic. I haven't used any but am considering for a > schoolyard project as wellTom > > -- > *From: *"rPauli" > *To: *sundial@uni-koeln.de > *Sent: *Thursday, May 2, 2013 12:25:24 PM > *Subject: *Re: Advice please: Good outdoor surface for painting an > analemmaticdial > > > Acrylic concrete adheres nicely, takes coloring well. But it is toxic as > it is applied, then dries hard, safe and durable. Any concrete/plaster > provider should have good advice about products that adhere to asphalt. My > local one is http://www.sbsg.com/concrete/overview/ > > On 5/2/2013 11:55 AM, gerard sheldon wrote: > > re: Good outdoor surface for painting an analemmatic dial > > I am helping a local school make a "human" sundial, i.e. an analemmatic > one, and the school is enthusiastic about the idea. (My daughter is a > pupil at that school.) I have been liaising with the art teacher, and > the suggestion is that one or more students studying art would mark out > the layout of the dial on the tarmac/asphalt ground, and then paint on it. >So both a scientific and artistic project. > > The difficulty we face is that the tarmac/asphalt surface is quite grainy > and not good to paint on. Do you have any advice on how to get a good > smooth outdoor surface to paint on (and we want the surface to retain the > paint) ? > > Any advice would be appreciated. > > Thanks > > Gerard > > > > > ---https://lists.uni-koeln.de/mailman/listinfo/sundial > > > > --- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > > --- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: globe on the dome of the Gustaviaum
I call sundials like this "Terminator" sundials as they tell time by the terminator line between the sunny and dark sides. It is not a sharp line like a shadow but still useful for telling time. Orientation is important. The concept works well on a cylinder as well as a sphere, as an azimuth sundial on a vertical cylinder. See this article on Fer De Vries website quoting from Mac Oglesby and Joël Robic. http://www.de-zonnewijzerkring.nl/art-arch/eng-home-art-07-03.htm The design is good to wrap around a beer or wine bottle. The beer version, starting and ending at the winter solstice, has a male silhouette. The wine version, starting and ending at the summer solstice, has a feminine wineglass figure. It will give you an opportunity to talk about sundials in a social setting. Download the macro and prepare for garden parties. I have given them to friends, wrapped around an appropriate bottle, with their birthday noted as a red date line. Cheers, Roger Bailey From: Willy Leenders Sent: Thursday, May 02, 2013 1:02 PM To: Sundial sundiallist Subject: globe on the dome of the Gustaviaum The globe on the dome of the Gustavianum in Uppsala (Sweden) is a sundial. The shadow of the globe on the globe itself indicates the time. I want information about that operation as a sundial. Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be --- https://lists.uni-koeln.de/mailman/listinfo/sundial No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.3272 / Virus Database: 3162/6291 - Release Date: 05/02/13 - No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.3272 / Virus Database: 3162/6291 - Release Date: 05/02/13 <>--- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: globe on the dome of the Gustaviaum
Interesting 10 and 12 Claude Hartman On 5/2/2013 1:02 PM, Willy Leenders wrote: The globe on the dome of the Gustavianum in Uppsala (Sweden) is a sundial. The shadow of the globe on the globe itself indicates the time. I want information about that operation as a sundial. Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Advice please: Good outdoor surface for painting an analemmatic dial
Search on "Tennis Court Paint" and you will get all kinds of interesting info...some advertise minimal surface prep and they are non-skid . Most appear to be acrylic. I haven't used any but am considering for a schoolyard project as well Tom - Original Message - From: "rPauli" To: sundial@uni-koeln.de Sent: Thursday, May 2, 2013 12:25:24 PM Subject: Re: Advice please: Good outdoor surface for painting an analemmatic dial Acrylic concrete adheres nicely, takes coloring well. But it is toxic as it is applied, then dries hard, safe and durable. Any concrete/plaster provider should have good advice about products that adhere to asphalt. My local one is http://www.sbsg.com/concrete/overview/ On 5/2/2013 11:55 AM, gerard sheldon wrote: re: Good outdoor surface for painting an analemmatic dial I am helping a local school make a "human" sundial, i.e. an analemmatic one, and the school is enthusiastic about the idea. ( My daughter is a pupil at that school.) I have been liaising with the art teacher, and the suggestion is that one or more students studying art would mark out the layout of the dial on the tarmac/asphalt ground, and then paint on it. So both a scientific and artistic project. The difficulty we face is that the tarmac/asphalt surface is quite grainy and not good to paint on. Do you have any advice on how to get a good smooth outdoor surface to paint on (and we want the surface to retain the paint) ? Any advice would be appreciated. Thanks Gerard --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Advice please: Good outdoor surface for painting an analemmatic dial
Acrylic concrete adheres nicely, takes coloring well. But it is toxic as it is applied, then dries hard, safe and durable. Any concrete/plaster provider should have good advice about products that adhere to asphalt. My local one is http://www.sbsg.com/concrete/overview/ On 5/2/2013 11:55 AM, gerard sheldon wrote: re: Good outdoor surface for painting an analemmatic dial I am helping a local school make a "human" sundial, i.e. an analemmatic one, and the school is enthusiastic about the idea. (My daughter is a pupil at that school.) I have been liaising with the art teacher, and the suggestion is that one or more students studying art would mark out the layout of the dial on the tarmac/asphalt ground, and then paint on it.So both a scientific and artistic project. The difficulty we face is that the tarmac/asphalt surface is quite grainy and not good to paint on. Do you have any advice on how to get a good smooth outdoor surface to paint on (and we want the surface to retain the paint) ? Any advice would be appreciated. Thanks Gerard --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Advice please: Good outdoor surface for painting an analemmatic dial
re: Good outdoor surface for painting an analemmatic dial I am helping a local school make a "human" sundial, i.e. an analemmatic one, and the school is enthusiastic about the idea. (My daughter is a pupil at that school.) I have been liaising with the art teacher, and the suggestion is that one or more students studying art would mark out the layout of the dial on the tarmac/asphalt ground, and then paint on it. So both a scientific and artistic project. The difficulty we face is that the tarmac/asphalt surface is quite grainy and not good to paint on. Do you have any advice on how to get a good smooth outdoor surface to paint on (and we want the surface to retain the paint) ? Any advice would be appreciated. Thanks Gerard--- https://lists.uni-koeln.de/mailman/listinfo/sundial
